JP2007305253A - Method for transporting an apparatus having an electronic circuit, and transport equipment used for the transport - Google Patents

Abstract

The present invention provides a transport method for transporting a device that is sensitive to static electricity without causing electrostatic damage, and a transport tool used in the transport method.
According to one aspect of the present invention, a ground terminal of an FPC connector attached to an actuator is electrically connected to a self-discharge portion that self-discharges charging in the air. . As a result, the electrification charged in the FPC 121 or the like can be slowly discharged from the self-discharge material during conveyance, and a surge current due to electrostatic ESD (Electro Static Discharge) charged in the manufacturing process can cause static electricity in the head element portion. It can prevent electric breakdown or characteristic deterioration.
[Selection] Figure 6

Description

  The present invention relates to a method of transporting a device that is sensitive to static electricity and a transport instrument used for transporting the device.

  As data storage devices, devices using various types of media such as optical disks and magnetic tapes are known. Among them, hard disk drives (HDDs) are widely used as computer storage devices. However, it is one of the storage devices indispensable in the current computer system. Furthermore, applications of HDDs such as a removable memory used in a moving image recording / reproducing apparatus, a car navigation system, a digital camera, etc. are expanding more and more due to its excellent characteristics.

  The magnetic disk used in the HDD has a plurality of data tracks formed concentrically, and each data track has a plurality of data including a plurality of servo data having address information and user data. A sector is recorded. A plurality of data sectors are recorded between each servo data. When the head element unit accesses a desired data sector according to the address information of the servo data, data writing to the data sector and data reading from the data sector can be performed.

  The head element portion is mounted on a slider, and the slider is fixed on the suspension of the actuator. The assembly of the actuator and the head slider is called a head stack assembly (HSA). The assembly of the suspension and the head slider is called a head gimbal assembly (HGA).

  A trace, which is a signal transmission wiring, is connected to the head element portion, and transmits a signal between the head element portion and the preamplifier. The trace is typically secured on the suspension and disposed along the actuator. Since the trace includes an insulating layer around the transmission line, which is a conductor, charges due to static electricity are accumulated in the trace by handling in the manufacturing process of the HGA.

  The HGA is connected to a component (referred to herein as COMB) including an arm and a VCM coil, and an HSA is manufactured. The HSA includes an IC (referred to herein as arm electronics (AE)) on which a preamplifier is mounted. The AE is connected to the trace and mounted on the FPC connected to the control circuit board. Charges due to static electricity are accumulated in traces, FPCs, and the like by handling in the manufacturing process of the HSA.

  Various technologies have been developed to increase the capacity and speed of HDDs. One of them is miniaturization of the head element portion. By reducing the head element portion, the area used for reading / writing is reduced, and the amount of data that can be stored in the same area can be increased. However, as the head becomes smaller, there arises a problem that the antistatic performance of the head becomes weaker. The term “electrostatic resistance” as used herein refers to the magnitude of static electricity that the product can withstand.

  In order to cope with the decrease in the antistatic performance of the head element portion, it is necessary to take measures more than the conventional measures against static electricity. Even when transporting HSA, etc., countermeasures against static electricity are required. It can be charged by friction when the HSA is touched or placed. Alternatively, the HSA may be charged by a charge that flows down in the air. For this reason, it is considered that they cannot be completely prevented from being charged.

  When a device including an element sensitive to static electricity, such as a head element portion, is transported in a manufacturing process without being subjected to electrostatic protection packaging, the device may be easily charged during transport work and may be subjected to electrostatic damage. In addition, when a worker wearing conductive work shoes is transported by hand on a floor that has been subjected to static electricity countermeasures, or when transported by a cart equipped with conductive casters, Is generated by frictional charging with the floor. Accordingly, anti-static performance is required for a tray for transporting a device having low anti-static performance.

Conventionally, such a tray is formed of a material having a predetermined resistance value and blocks externally generated static electricity from reaching a device that is sensitive to static electricity (see, for example, Patent Document 1). Alternatively, other conventional techniques connect the GND line to a cart or the like that is in contact with the tray. Furthermore, in order to prevent a rapid current from flowing through the GND line, a high resistance member is inserted between the device sensitive to static electricity and the GND.
JP 2001-118224 A

  However, the method of preventing static electricity generated externally by a material having a predetermined resistance value from reaching a device that is vulnerable to static electricity is to remove the electric charge charged when the operator's hand touches the product. The product cannot be discharged and the product is kept charged. Furthermore, since there are electrons flowing down in the air, air charges are accumulated in the product. Alternatively, the method of connecting to the GND line through the high-resistance member requires connecting the device to the GND line every time it is transported, resulting in an additional processing step.

According to one aspect of the present invention, there is provided a method of transporting a device, wherein a device having an electronic circuit is disposed in a transport device, and a transmission line of the electrical circuit and a self-discharge that discharges a charged charge provided in the transport device into the air. The apparatus is transported in a state where the self-discharge part made of a material is electrically connected and the transmission line is electrically connected to the self-discharge part. By using the self-discharge portion, it is possible to remove the charge by a simple method while suppressing damage to the element in the circuit.
It is preferable to electrically connect the ground wire of the electric circuit and the self-discharge portion. As a result, the charges in the circuit can be easily removed effectively.

  The device is an assembly part used in a disk drive device, and transmits a head, an actuator mounted with the head, a connector connected to an external circuit, and a signal between the connector and the head. It has a flexible wiring board, and the terminal of the connector can be electrically connected to the self-discharge part. Furthermore, it is preferable that the apparatus is transported in a state where the connector is fixed to the transport device by a fixing portion. Thereby, more reliable contact can be obtained.

  Furthermore, it is preferable that the terminal is formed in the opening of the connector, and the terminal is electrically connected to the self-discharge portion through a contact pin provided in the transporting instrument through the opening. Thereby, more reliable contact can be obtained. Furthermore, it is preferable that the connector is disposed on a conductor portion that is in contact with the self-discharge portion, and the contact pin provided on the conductor portion is brought into contact with a ground terminal. This can improve the strength and positioning system.

  Preferably, the apparatus includes a ground terminal in an opening provided in the resin portion, and a contact pin provided in the transport device and electrically connected to the self-discharge portion is passed through the opening to contact the ground terminal. .

  Another aspect of the present invention is a transport device for transporting a device having an electronic circuit, a placement portion for placing the device, a terminal inserted into the opening of the device, and a terminal provided in the opening. The contact pin is in contact with the contact pin, and is provided with a self-discharge portion made of a self-discharge material that is electrically connected to the contact pin and discharges charged electric charges into the air. By using the self-discharge portion, it is possible to remove the charge by a simple method while suppressing damage to the element in the circuit.

  It is preferable to further have a fixing portion for fixing the contact pin in the opening. Alternatively, the device further includes a conductive plate having electrical conductivity and in surface contact with the self-discharge portion, wherein at least a part of the device is disposed on the conductive plate, and the contact pins are provided on the conductive plate. It is preferable that This can improve the strength and positioning system.

The self-discharge part preferably has an uneven part. As a result, the required discharge performance can be obtained with a small self-discharge portion. Alternatively, the self-discharge material preferably has a resistance of 10 ⁹ Ω to 10 ¹¹ Ω. As a result, charging of the substance itself can be suppressed, and further, a rapid current can be prevented from flowing from the device through the self-discharge material, thereby preventing damage to the elements in the circuit more reliably.

  According to the present invention, electrostatic breakdown of an electronic element can be suppressed.

  Hereinafter, embodiments to which the present invention can be applied will be described. For clarity of explanation, the following description and drawings are omitted and simplified as appropriate. Moreover, in each drawing, the same code | symbol is attached | subjected to the same element and the duplication description is abbreviate | omitted as needed for clarification of description.

  The present embodiment particularly relates to a method of transporting a device that is sensitive to static electricity and a transport instrument used for the transport. The apparatus is transported in a state where the transmission line of the apparatus is electrically connected to a material that self-discharges charging in the air. As a result, the electrification charged in the device can be slowly discharged from the self-discharge material during transportation, and a surge current due to electrostatic ESD (Electro Static Discharge) charged in the manufacturing process is mounted on the device. It is possible to prevent electrostatic breakdown or characteristic deterioration of the element.

  In the following, an example in which the present invention is applied to a manufacturing process of a hard disk drive (HDD) will be described as a preferable example. In the HDD manufacturing process, electrostatic breakdown of the head element portion becomes a problem particularly in transporting head components such as a head stack assembly (HSA) or a head gimbal assembly (HGA). First, the configuration of the HDD, HSA, and HGA will be described.

  FIG. 1 is a plan view schematically showing the overall configuration of the HDD 100. The HDD 100 includes a single magnetic disk 102 or a plurality of magnetic disks 102 arranged in a stacked manner within a base 101 that constitutes a part of the housing. A spindle motor (SPM) 103 rotates the magnetic disk 102. The opening of the base 101 is blocked by a top cover (not shown). Data can be recorded on both sides or only one side of the magnetic disk 102. A plurality of head sliders 104 corresponding to the respective recording surfaces of the magnetic disk 102 are held by the actuator 107. The head slider 104 is composed of a slider and a head element portion fixed to the surface of the slider. The head element section has a write element that converts an electric signal into a magnetic field according to data stored in the magnetic disk 102 and / or a read element that converts a magnetic field from the magnetic disk 102 into an electric signal. A signal between the head element unit and the control circuit is transmitted via the FPC 112 and the FPC connector 130.

  The actuator 107 is rotatably held on the rotation shaft 109. The VCM 105 rotates the actuator 107 about the rotation shaft 109 in accordance with a drive signal that is sent to the VCM coil 106. The actuator 107 moves the head slider 104 along the radial direction of the surface of the magnetic disk 102, whereby the head element unit accesses a desired track. The pressure due to the viscosity of air between the ABS (Air Bearing Surface) surface of the slider facing the magnetic disk 102 and the rotating magnetic disk 102 balances with the pressure applied by the actuator 107 in the direction of the magnetic disk 102. The head slider 104 floats over the magnetic disk 102 with a gap.

  When the rotation of the magnetic disk 102 stops, the actuator 107 retracts the head slider 104 from the magnetic disk 102 to the ramp mechanism 108. In addition, there is known a CSS (Contact Start and Stop) method in which the head is evacuated to a zone arranged on the inner periphery of the magnetic disk 102 when the head does not perform data writing / reading processing. The present invention is also applicable to the HDD according to the embodiment. The operation of the HDD 100 is controlled by a control circuit board (not shown) mounted on the back surface of the base 101.

  2A and 2B schematically show the configuration of an HSA (Head Stack Assembly) 110 viewed from different directions. The HSA 110 is an assembly including the actuator 107 and the head slider 104. The HSA 110 of this embodiment includes an FPC 112 (Flexible Printed Circuit), a VCM coil 106 receiving unit 114 fixed in a coil support 119, and head gimbal assemblies (HGA) 120a and 120b. A preamplifier IC (not shown) that amplifies a signal handled by the head element unit is mounted on the FPC 112 and in the vicinity of the bearing unit 114 on the actuator 107. An FPC connector 130 is connected to the opposite side of the preamplifier IC in the FPC 112. The FPC connector 130 is mounted on the bottom surface of the base 101 and is connected to an external control circuit board in a circuit manner through an opening provided in the base 101. The FPC 112 includes a power line, a ground line, a control signal line, and the like for the preamplifier IC in addition to the read / write signal line.

  The HGAs 120a and 120b are connected to the arms 116a and 116b of the HSA 110, respectively. As shown in FIG. 3, each HGA 120 includes a head slider 104 and a suspension 122. In addition, the HGA 120 includes a trace 128. In the head slider 104, the read element and the write element function as a transducer that converts between a magnetic field change and an electric signal. Each of the read element unit and the write element unit includes two connection terminals, and each terminal is connected to each of the four wirings in the trace 128.

  The suspension 122 includes a load beam 125, a gimbal 126, and a mount plate 124. These members are joined and integrated by laser spot welding or caulking. The gimbal 126 has a tongue piece, and the head slider 104 is fixed on the surface thereof with an epoxy resin or the like. The gimbal 126 is flexible and elastically supports the head slider 104. The load beam 125 functions as a spring that generates a constant load that balances the flying force of the head slider 104. The load beam 125 includes a tab 121 at the tip. When the rotation of the magnetic disk 102 is stopped, the tab 121 stops on the ramp 108 and retracts the head slider 104 from the surface of the magnetic disk 102.

  The trace 128 includes a plurality of transmission lines separated from each other by an insulating layer. Each transmission line is connected to the head element section in the head slider 104 and transmits the signal. One end of the trace 128 constitutes a multi-connector portion 129 and is electrically connected to the PFC 112 and the preamplifier IC thereon. The trace 128 is fixed to the gimbal 126 with an adhesive or the like, and an epoxy resin or the like covers the outside as necessary. This trace is also called ILS (Integrated Leads Suspension) or FOS (Flex On Suspension). Note that the number of transmission lines of the trace 128 changes according to the type of the head slider 104.

  The trace 128 and the FPC 112 include a transmission line that is a conductor such as copper and an insulating layer such as a poly-meaning degree formed around the transmission line. That is, the trace 128 and the FPC 112 have a capacitor configuration in which an insulator is formed between conductors. For this reason, electric charges due to static electricity are accumulated in the trace 128 and the FPC 112 due to frictional charges generated during handling in the manufacturing process of the HGA 120, HSA 110, or HDD 100 and charges that flow down in the air. Furthermore, the suspension 122 is made of metal (conductor). For this reason, a capacitor including the transmission line in the trace 128, the suspension 122, and an insulating layer between them is configured, and charges due to static electricity are also accumulated therein.

  Here, the head element portion is a thin film element and is vulnerable to ESD (Electro Static Discharge). When the ESD current flows through the head element portion, the head element portion may be destroyed or its characteristics may be greatly changed. In particular, the read element uses a magnetoresistive element (MR element: Magnet Resistive element or GMR element: Giant Magnet Resistive element). For example, the GMR film has a thickness of several tens of nm and a resistance of several tens of ohms. Yes. For this reason, the read element is very weak against the ESD current, and it is important to prevent the ESD current from flowing through the read element.

  The HDD 1 is manufactured by mounting the head slider 104 on the suspension 121 and manufacturing the HGA 120. Then, HS110 is manufactured by connecting the HGA 120 to the COMB, which is a part including the arm 146 and the VCM coil 106. A preamplifier IC and an FPC 112 are mounted on the HSA 110. Components such as SPM 105, HSA 110, magnetic disk 102, and VCM magnet are mounted in base 101, and a head disk assembly (HDA) is manufactured by closing the opening of base 101 with a top cover. A control circuit board is mounted on the back side of the base of the HDA to complete the HDD 100.

  In the manufacturing process of the HGA 120 and the HSA 110, it is necessary to transport them. As described above, these head components are easily charged with static electricity, and it is important to prevent electrostatic breakdown and characteristic deterioration of the head element portion, particularly the read element, due to a rapid ESD current. On the other hand, from the viewpoint of manufacturing throughput, there is a demand for a method for removing charge by a method as simple as possible without increasing the number of manufacturing process steps. In the following, a method for transporting HSA and its transporting device will be specifically described. A similar charge removal method can be applied to the HGA.

  FIG. 4 shows the transport state of the HSA 110 according to the present embodiment. FIG. 4 shows the HSA 110 and the transport device 1 that transports the HSA 110 placed thereon. In FIG. 4, the HSA 110 is placed and fixed on the transport device 1. The transport device 1 of the present embodiment includes a base portion 11 that is handled in transport, a fixed plate 12 that is an example of a fixed portion, and a self-discharge material portion 13 that is provided on the upper surface of the base portion 11. The self-discharge material portion 13 discharges the electric charge charged in the electronic circuit of the HSA 110, particularly the electric charge charged in the FPC 112, into the air. Details of the self-discharge material part 13 will be described later.

  The FPC connector 130 is fixed by sandwiching the FPC connector 130 of the HSA 110 between the fixing plate 12 and the base 11. At this time, the wide main surface of the fixed plate 12 and the side surface of the base 11 are opposed to each other. The fixed plate 12 and the base 11 can be formed of a highly rigid metal such as a steel material.

  FIG. 5A is an exploded perspective view of the HSA 110 and the transport device 1 as seen from the base 11 side. The transfer device 1 is provided with an actuator placement portion 14 where the actuator 107 is disposed and a connector placement portion 15 where the FPC connector 130 is disposed. As shown in FIGS. 4 and 5A, the actuator 107 is placed on the actuator placement portion 14. An arcuate recess 141 that matches a part of the outer shape of the bearing unit 114 of the actuator 107 is provided in the actuator placement portion 14. When a part of the bearing unit 114 is fitted into the indented portion 141, the actuator 107 is prevented from falling off from the transfer device 1 (base portion 11).

  FIG. 5B is an exploded perspective view partially showing the connector placement portion 15 and the HSA 110. As shown in FIG. 5B, the connector mounting portion 15 includes a conductive plate 20 that is an example of a conductive portion having electrical conductivity. The conductive plate 20 can be formed of a metal such as aluminum or stainless steel. As shown in FIG. 5A, the FPC connector 130 is disposed on the conductive plate 20, and the FPC connector 130 is pressed and fixed to the conductive plate 20 using the fixing plate 12. The fixing plate 12 is detachable and is fixed to the base 11 using screws or the like.

  On the surface of the conductive plate 20 facing the FPC connector 130, a GND contact pin 18 and a guide pin 19 are provided. The surface of the conductive plate 20 is in contact with the self-discharge material portion 13 on the side opposite to the surface on which the GND contact pins 18 are provided. Accordingly, the self-discharge material portion 13 using the self-discharge material is electrically connected to the GND contact pin 18. Use of the conductive plate 20 increases strength and durability and improves positioning accuracy. Further, the conductive plate 20 is detachable and can be easily exchanged according to the connector shape of the FPC connector 130.

  With reference to FIG. 6A and FIG. 6B, the fixing of the FPC connector 130 to the conductive plate 20 will be described in detail. FIG. 6B is an enlarged view of a portion surrounded by a circle in FIG. As shown in FIG. 6B, the conductor GND contact pin 18 and the guide pin 19 protrude from the surface on which the FPC connector 130 is placed in the conductive plate 20. On the other hand, the FPC connector 130 is formed with a GND contact hole 131 and a guide hole 132. The FPC connector 130 has a transmission line and terminals formed on a main body made of resin.

  At the time of conveyance, the GND contact pin 18 is inserted into the GND contact hole 131. The guide pin 19 is inserted into the guide hole 132. The guide pins 19 engage with the guide holes 132 to position the FPC connector 130 on the conductive plate 20 and contribute to fixing the FPC connector 130 at a predetermined position.

  Similarly, the GND contact pin 18 is engaged with the GND contact hole 131 to position the FPC connector 130 on the conductive plate 20 and contribute to fixing the FPC connector 130 at a predetermined position. Further, the ground terminal of the transmission line is exposed in the GND contact hole 131 provided in the resin main body portion of the FPC connector 130. The GND contact pin 18 inserted into the GND contact hole 131 is in contact with the ground terminal. By bringing the ground terminal in the hole into contact with the insertion pin, contact can be obtained easily and reliably.

  When the GND contact pin 18 is inserted into the GND contact hole 131 and the guide pin 19 is inserted into the guide hole 132, the fixing plate 12 is pressed against the base 11 and the FPC connector 130, whereby the FPC connector 130 and the HSA 100 are Fixed. By fixing the FPC connector 130 with the fixing plate 12, the contact between the GND contact pin 18 and the ground terminal in the GND contact hole 131 can be ensured even during conveyance. The GND contact hole 131 and the guide hole 132 are at diagonal positions sandwiching the protruding terminal portion of the FPC connector 130 connected to the control circuit board on the back of the base 101, and are effective for positioning and fixing.

  In this example, a single GND contact pin 18 and a guide pin 19 are illustrated. However, a plurality of GND contact pins 18 may be provided by providing a plurality of pins or without providing the guide pins 19. Can be provided. When two or more GND contact pins 18 are provided, it is preferable that the GND contact pins 18 are separated from each other by the distance between the GND contact pins 18 and the other GND contact pins 18 on the main surface of the circuit board. This is because the FPC connector 130 can be securely fixed by separating the GND contact pins 18 from each other. In this example, the GND contact hole 131 and the guide hole 132 are through holes, but they may be closed on one surface. The guide hole 132 is a hole formed in the resin portion of the FPC connector 130, and the transmission line is not exposed.

  The electric charge charged in the electronic circuit of the HSA 110 flows from the ground terminal of the GND contact hole 131 to the self-discharge material portion 13 through the GND contact pin 18 and the conductive plate 20. As described above, the self-discharge material portion 13 slowly discharges the charge charged by itself into the air. The self-discharge material part 13 is formed of a self-discharge material. The self-discharge material absorbs moisture in the air, and the absorbed moisture contains electric charges charged in the self-discharge material. And the water | moisture content of the state containing an electric charge evaporates from a self-discharge material, and the electric charge in a self-discharge material is discharged slowly in the air. Therefore, by electrically connecting to the self-discharge member, the charge can be slowly discharged into the air through the self-discharge member.

  The electrostatic charge of the HSA 110 on the transport device 1 can be discharged from two paths. One is discharge into the air by the self-discharge material portion 13 described above. The other is a discharge path that flows to GND via the self-discharge material part 13 and the base part 11. At the time of transport, the transport device 1 is in a floating state, and there is a path only for discharge into the air by the self-discharge material portion 13. On the other hand, when grounding on the work table, etc., by connecting the work table to GND, it is possible to perform discharge along the route to GND via the work table. That is, in this case, there are two discharge paths.

Therefore, it is preferable that the self-discharge material of the present embodiment has an electric resistance characteristic indicating diffusibility. Specifically, it is preferable that the self-discharge material of this embodiment substantially has a resistance value of 10 ⁹ Ω to 10 ¹¹ Ω. Accordingly, it is possible to prevent a rapid ESD current from flowing to the base portion 11 through the self-discharge material portion 13 by having a resistance of 10 ⁹ Ω or more. At the same time, the self-discharge material part 13 itself can be effectively prevented from being charged by having a resistance of 10 ¹¹ Ω or less. As the self-discharge material, for example, a material based on polo acetal can be used. As an example, Pomalux manufactured by WESTLAKE can be used.

  The electrostatic charge accumulated in the flexible wiring board such as the trace 118 and the FPC 112 cannot be removed even by an ionizer, and there is only a method of removing it by directly contacting with GND. However, when the self-discharge material portion 13 is used. Thus, it is possible to discharge static electricity without directly contacting GND.

  The self-discharge material portion 13 preferably has an uneven shape on the surface. Thereby, the area in which the self-discharge material part 13 contacts with air can be made wider. By increasing the area where the self-discharge material part 13 comes into contact with air, the amount of moisture absorbed in the air increases, and the electrostatic charge discharged from the self-discharge material part 13 even by the self-discharge material part 13 having a small volume. The amount of can also be increased. Note that the surface area of the self-discharge material portion 13 is determined in consideration of the discharge speed of electric charges and the influence of discharge on the element such as the head element portion.

  As described above, the electrostatic charge that flows to the ground terminal of the FPC connector 130 flows to the self-discharge material portion 13 through the GND contact pin 18. The electrostatic charge that has flowed into the self-discharge material part 13 is discharged into the air together with the moisture absorbed in the self-discharge material part 13. At this time, since the self-discharge material portion 13 uses a high-resistance self-discharge material, the above-described discharge process is performed slowly.

  Each element of the electronic circuit on the HSA 110 is connected in circuit to the GND line. Therefore, by electrically connecting the GND in the circuit base to the self-discharge material portion 13, the charge in the circuit can be effectively removed. That is, the charge accumulated in the HSA 100 placed on the transport device 1, in particular, the charge charged on the trace 128 or the FPC 112 flows to the self-discharge material portion 13 by flowing to the ground terminal of the FPC connector 130. , Will be discharged slowly.

  As described above, electrostatic charges in the HSA 100 can be discharged without causing electrostatic damage to the head element portion provided in the HSA 100. Moreover, in the conveyance instrument 1 which concerns on this Embodiment, since an electrostatic charge will be discharged in the air by the self-discharge material part 13, it is not necessary to connect a GND wire and the conveyance instrument 1. FIG. Therefore, the HSA 100 can be transported together with the transport device 1 without using a process for connecting to the GND line.

  It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. For example, in the above example, the HSA 110 is transported, but the charge removal using the self-discharge material can be performed in the transport of the HGA 120. For example, the transmission line exposed at the multi-connector portion 129 provided at the end of the trace 128 of the HGA 120 is electrically connected to the self-discharge material portion 13. In particular, the transmission line connected to the read element and the self-discharge material portion 13 are electrically connected to prevent a large ESD current from flowing through the read element.

In order to discharge electric charges slowly and reliably, it is preferable that the resistance of the self-discharge material is substantially 10 ⁹ Ω to 10 ¹¹ Ω. However, the head element exhibits diffusive or insulating properties, that is, non-conductive characteristics. Other values may be used as long as the discharge can be performed without damaging the part. Further, in order to cope with processability and various connector types, it is preferable to mount the FPC connector on the replaceable conductive plate, but the FPC connector may be mounted directly on the base portion 11. In addition, the FPC connector can be fixed by using a plate other than the fixed plate, or if the FPC connector does not drop out, the fixed plate may not be used.

  The transport method of this embodiment is useful in manufacturing HDDs such as HSA and HGA, but it can of course be applied to other apparatuses. In particular, it is useful for an apparatus including an FPC that is easily charged, but is not limited thereto. Moreover, the transmission line electrically connected to the self-discharge member is not limited to the transmission line in the FPC, and may be connected to a conductor line formed on a non-flexible substrate made of glass epoxy or the like.

1 is a plan view schematically showing the overall configuration of a hard disk drive (HDD). 1 is a perspective view schematically showing a configuration of a head stack assembly (HSA) mounted on an HDD. It is a perspective view which shows typically the structure of the head gimbal assembly mounted in HDD. It is a perspective view which shows typically the state where HSA was equipped to a conveyance instrument in order to convey HSA. It is a disassembled perspective view of HSA and a conveyance instrument. It is a figure which shows the mounting method to the electrically conductive plate of a FPC connector.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transfer device, 11 Base, 12 Fixed plate, 13 Self-discharge material part 14 Actuator mounting part, 15 Connector mounting part, 18 GND contact pin 19 Guide pin, 20 Conductive plate, 100 Hard disk drive 101 Base, 102 Magnetic disk, 103 spindle motor 104 head slider, 105 voice coil motor, 106 VCM coil 107 actuator, 108 ramp, 109 rotating shaft,
110 Head Stack Assembly, 112 FPC, 114 Bearing Unit 119 Coil Support, 120 Head Gimbal Assembly 122 Suspension, 124 Mount Plate, 125 Load Beam 126 Gimbal, 128 Trace, 129 Multi Connector Part 130 FPC Connector, 131 GND contact hole, 132 guide hole 141 recess

Claims (12)

Place the device with the electronic circuit on the transport device,
Electrically connecting a transmission line of the electrical circuit and a self-discharge portion made of a self-discharge material that discharges the charged electric charge provided in the transport device into the air;
Carrying the device in a state in which the transmission line is electrically connected to the self-discharge section;
Device transport method.   The method according to claim 1, wherein a ground line of the electric circuit and the self-discharge part are electrically connected. The apparatus is an assembly part used in a disk drive apparatus, and transmits a head, an actuator mounted with the head, a connector connected to an external circuit, and a signal between the connector and the head. A flexible wiring board, and
The method according to claim 1, wherein a terminal of the connector is electrically connected to the self-discharge portion.   The method of Claim 3 which conveys the said apparatus in the state which fixed the said connector to the said conveyance instrument by the fixing | fixed part. The terminal is formed in the opening of the connector;
The method according to claim 4, wherein a contact pin provided on the transport device is passed through the opening to electrically connect the terminal to the self-discharge portion. Placing the connector on the conductor portion in contact with the self-discharge portion;
The method according to claim 5, wherein the contact pin provided on the conductor portion is brought into contact with a ground terminal. The device includes a ground terminal in an opening provided in the resin portion,
The method according to claim 1, wherein a contact pin provided on the transport device and electrically connected to the self-discharge portion is brought into contact with the ground terminal through the opening. A transport device for transporting a device having an electronic circuit,
A mounting section for mounting the device;
A contact pin that is inserted into the opening of the device and contacts a terminal provided in the opening;
A self-discharge portion made of a self-discharge material that is electrically connected to the contact pin and discharges a charged charge into the air itself;
Conveying device having.   The transport device according to claim 8, further comprising a fixing portion that fixes the contact pin in the opening. A conductive plate having electrical conductivity and in surface contact with the self-discharge portion;
At least a portion of the device is disposed on the conductive plate;
The transport tool according to claim 8, wherein the contact pin is provided on the conductive plate.   The transport device according to claim 8, wherein the self-discharge portion has an uneven portion. The transport device according to claim 8, wherein the self-discharge material has a resistance of 10 ⁹ Ω to 10 ¹¹ Ω.

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