CN104369526A - PCB screen printing board manufacturing method - Google Patents
PCB screen printing board manufacturing method Download PDFInfo
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- CN104369526A CN104369526A CN201310350876.4A CN201310350876A CN104369526A CN 104369526 A CN104369526 A CN 104369526A CN 201310350876 A CN201310350876 A CN 201310350876A CN 104369526 A CN104369526 A CN 104369526A
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- 238000007650 screen-printing Methods 0.000 title abstract 7
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- 238000000034 method Methods 0.000 claims abstract description 15
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- 238000011161 development Methods 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 12
- 238000007639 printing Methods 0.000 claims description 12
- 238000004026 adhesive bonding Methods 0.000 claims description 9
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- 238000003466 welding Methods 0.000 claims description 3
- 238000007796 conventional method Methods 0.000 abstract description 9
- 238000010422 painting Methods 0.000 abstract 2
- 239000012528 membrane Substances 0.000 abstract 1
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- Photosensitive Polymer And Photoresist Processing (AREA)
Abstract
The invention discloses a PCB screen printing board manufacturing method. The method comprises the following steps: (A) drawing a net; (B) washing the net; (C) painting photosensitive membrane on the net; (D) exposing; (E) developing. In the conventional method, the net drawing and net washing are carried out at the same time, so the screen printing board is easily polluted, and the application success rate is low. In the provided manufacturing method, the net drawing and net washing are separated, the secondary pollution on the screen printing board is completely avoided, moreover, the quality of the screen printing board is uniform, and the product uniformity is improved. In the manufacturing method, the screen printing board is washed by a ghost-image removing ointment and a liquid detergent, the using amount of clean water is largely reduced, compared to the conventional method which uses clean water to wash the screen printing board, thus the resources are saved, and the production cost is reduced. Compared to the conventional method of one-time painting, the thickness and using amount of photosensitive paste are both reduced, the self-drying time of the photosensitive paste is also shortened, and the production efficiency is improved.
Description
Technical field
The present invention relates to a kind of printing method of PCB, specifically refer to pcb board manufacturing method of screen.
Background technology
Printed circuit board, also known as printed circuit board (PCB), is the supplier of electronic devices and components electrical connection.Its development has the history of more than 100 year; Its design mainly layout design; Adopt the major advantage of circuit board to be the mistake greatly reducing wiring and assembling, improve the gentle productive labor rate of Automated water.Pcb board has following three kinds of main classified types: single sided board (Single-SidedBoards), and on the most basic PCB, part concentrates on wherein one side, and wire then concentrates on another side.Because wire only appears at wherein one side, so this PCB is called single sided board (Single-sided).Because single sided board has many strict restrictions (because only have one side, can not intersect between wiring and must around path alone) in designed lines, so only have early stage circuit just to use this kind of plank; Dual platen (Double-SidedBoards), there is wiring on the two sides of this circuit board, but with the wire on two sides, suitable circuit must be had between two sides to connect." bridge " between this circuit is called guide hole (via), guide hole is on PCB, be full of or the duck eye of coated with metal, it can be connected with the wire on two sides, because the area ratio single sided board of dual platen is large one times, dual platen solves because connect up staggered difficult point in single sided board, and it is more suitable for being used on the circuit more complicated than single sided board, multi-layer sheet (Multi-LayerBoards) is in order to increase the area that can connect up, more single or two-sided wiring plates used by multi-layer sheet, two-sidedly internal layer is made with one piece, two pieces of one sides do outer or two pieces two-sidedly make internal layer, two pieces of one sides make outer field printed substrate, by navigation system and adhesive material alternately together and the printed substrate that conductive pattern is undertaken interconnecting by designing requirement just becomes four layers, six-layer printed circuit board, also referred to as multilayer printed circuit board, which floor independently wiring layer is the number of plies of plank do not represented, dead level can be added under special circumstances to control thickness of slab, the usual number of plies is all even number, and comprise outermost two-layer, most motherboard is all the structure of 4 to 8 layers, but technically theory can accomplish the pcb board of nearly 100 layers, large-scale supercomputer uses the motherboard of suitable multilayer mostly, but because this kind of computer can replace with the cluster of many common computer, super multi-layer sheet is not employed gradually, because each layer in PCB combines all closely, generally not too easily find out actual number, if but examine motherboard, or can find out.
Summary of the invention
The object of the present invention is to provide pcb board manufacturing method of screen, solve current supplying in pcb board screen to print process, the uneven problem of product quality of existence, reaches the high object of the factor of merit of improving the quality of products with unified method.
Object of the present invention is achieved through the following technical solutions:
Pcb board manufacturing method of screen, carries out successively according to following steps: (A) draws in the net; (B) net is washed; (C) light-sensitive surface is coated with; (D) expose; (E) develop.The present invention adopts (A) to draw in the net; (B) net is washed; (C) light-sensitive surface is coated with; (D) expose; (E) order of developing is carried out processing and fabricating and is gone out pcb board half tone, carry out with washing together with net relative to drawing in the net in conventional method, there is no problem separately, solve its problem that web plate pollution rate existed is high, use success rate is low, so can avoid the secondary pollution of web plate completely, and make the uniform quality of web plate, improve the uniformity of product.
Specifically, described step (A) draws in the net to comprise the following steps:
(A1) first that the cull on screen frame or garbage-cleaning is clean, choose a first-class primer of burnishing surface, park 30 minutes, make primer dry through;
(A2) inner side is recalled to by dry for net puller four limit pulling force, first screen frame is put into and draws in the net on table top, and then grenadine is clipped in the clamping plate on net puller four limit, and the distance between clamping plate and clamping plate keeps in the same size, keep smooth during grenadine gripping, more than corner grenadine is inside, go out 1-2cm;
(A3) grenadine clip rear beginning first time draw in the net, four limit stayed masts are at the uniform velocity stretched one by one, first draw warp direction, then draw weft direction, first time tensile stress be after 20-30N; Leave standstill and within 10-15 minute, draw second time again, second time tensile stress is after 30-38N; Leave standstill and within 10-15 minute, draw third time again, tensile stress is 38-45N and after the maintenance evenly of adjustment four limit tension force, leaves standstill 20-30 minute for the third time;
(A4) rise screen frame gluing, first with hairbrush, glue be evenly coated in grenadine and screen frame overlapping position, then carry out scraping once with frictioning, after glue dries 5-8 minute more heavily gluing once, drying 30 minutes after secondary gluing;
(A5) off line, remove unnecessary grenadine with scissors or blade, and on half tone, mark deadline and off line tension force, in screen frame, mend limit glue sealing with red, treat that net is enclosed on screen frame and grenadine bonding plane with animal glue before use;
(A6) leave standstill deposit, drawn in the net rear leave standstill deposit 48-72 hour.
Drawing in the net the object of operation is to provide up-to-standard, and the half tone that product property is evenly unified, half tone is the basis made, and determines the quality of product, therefore needs to perform in strict accordance with method step of the present invention, can ensure quality uniformity and the uniformity of product.
Specifically, described step (B) is washed net and is comprised the following steps:
(B1) first carry out degrease process with net washing water or liquid detergent, then rinse well with hydraulic giant afterwards;
(B2) old half tone moves back film process: return waiting the old half tone washed, and puts into the good stripping powder liquid medicine tank of pre-coordination and soaks 5 ~ 15 minutes;
(B3) after edition film dissolves, take out half tone, and rinse with hydraulic giant;
(B4) remove the residual stain ink on half tone again with net washing water erasing, use ghost cream and liquid detergent to carry out degrease ghost, and rinse with hydraulic giant;
(B5) half tone cleaned up is dried ponding, be put in baking box and carry out baking 5-15 minute with the temperature of 40 DEG C-50 DEG C, take out after moisture is dried.
Washing the main object of net step is remove ink on half tone and grease, avoid ink, grease on the impact of subsequent technique, therefore, need to carry out matting, and in matting, selecting of ghost cream and liquid detergent is important improvement point in the present invention, rinse relative to the clear water in conventional method, greatly save the use amount of clear water, effectively saved resource, reduced production cost.
Specifically, described step (C) is coated with light-sensitive surface and comprises the following steps:
(C1) be spread evenly across on the printing surface of half tone with scraping stock tank by photosensitive slurry good for pre-coordination, general circuit and character net coating 2-3 time, welding resistance are coated with 2 ~ 4 times, then photosensitive slurry good for pre-coordination are spread evenly across blade face 2-3 time;
(C2) light-sensitive surface is dry: be put in baking box by the half tone of coated photosensitive slurry, toast with the temperature of 40 DEG C ~ 50 DEG C, baking time controlled at 15 ~ 20 minutes.
The mode of the photosensitive slurry of even spread is adopted repeatedly in this step, improve the uniformity of photosensitive slurry, relative to once smearing in conventional method, not only reduce thickness and the use amount of photosensitive slurry, and shorten the time of himself drying, improve production efficiency.
Specifically, described step (D) exposure comprises the following steps:
(D1) first that board removing surface is clean, then facing up of egative film film film figure is placed on exposure machine glass surface, half tone middle position placed by film egative film;
(D2) use the firm egative film of adhesive tape, then throw in half tone contraposition, then put down upper cover and carry out extracting vacuum, open Exposing Lamp, will set the time for exposure in scope needed for corresponding half tone, behind perfect vacuum, start exposure;
(D3) expose complete taking-up half tone and egative film, half tone running water drenches version one time, then carries out bath development.
Specifically, described step (E) development comprises the following steps:
(E1) first with running water half tone drenched before bath development and uses high pressure water flushing print layout again, until image visualization, then with more weak hydraulic pressure continue to rinse printing surface domain until figure and picture manifest clear till;
(E2) dry around half tone with towel more than water, and low force blots the globule on edition face;
(E3) after development half tone dries, carry out half tone inspection, qualified half tone, close the outer surrounding printing opacity grenadine of domain with block slurry, stoped ink, defective, place under repair, when cannot place under repair, again will return and do.
Should be noted that following problem in the process: have allergic person, Rubber gloves operation need be worn, prevent net washing water and demoulding/degumming water; Half tone makes and must carry out under amber light; Half tone make-up room environment should keep neat clean; Exposure machine glass can not have stain and serious flower scar of wiping to block printing opacity, will use alcohol wipe glass transparent, in order to avoid affect photosensitive imaging before exposure; All nets newly drawn should identify mesh number and concrete deadline, can use after new net should place 48-72 hour after the grenadine loss of tension is solid; Light slurry and pad pasting before net, all will through half tone pre-treatment; Use the egative film film all to have to pass through and check that confirmation can be manufactured; When using online photosensitive slurry, first from net bottom face, operation, to front, makes it front half tone medicine film and is pressed onto net bottom face generation stereoeffect, reach silk-screen requirement effect; Each photosensitive slurry, must keep the even thickness of medicine film basically identical; The figure of the fine and closely woven lines of circuit prevents pattern line from occurring zigzag with oblique net making; Peelable blue gel uses the photosensitive slurry of water film collocation superposition, photosensitive slurry 2-3 time on front, photosensitive slurry 4-5 time on net bottom face; All version films can carry out exposure operation after will thoroughly drying, and roasting the temperature inside the box must not more than 50 DEG C; Just can expose after bleeding and half tone is completely fixed; When half tone makes bath, the time should not be long, in order to avoid cause bath not penetrating, excessively, punching is hindered, washed out image shadow in bath; Pad pasting and starching requirement and exposure energy parameter.
The present invention compared with prior art, has following advantage and beneficial effect:
1 pcb board manufacturing method of screen of the present invention, carry out with washing together with net relative to drawing in the net in conventional method, there is no problem separately, solve its problem that web plate pollution rate existed is high, use success rate is low, so can avoid the secondary pollution of web plate completely, and make the uniform quality of web plate, improve the uniformity of product;
2 pcb board manufacturing method of screen of the present invention, washing the main object of net step is remove ink on half tone and grease, avoid ink, grease on the impact of subsequent technique, therefore, need to carry out matting, and in matting, selecting of ghost cream and liquid detergent is important improvement point in the present invention, rinses, greatly saved the use amount of clear water relative to the clear water in conventional method, effectively save resource, reduce production cost;
3 pcb board manufacturing method of screen of the present invention, adopt the mode of the photosensitive slurry of repeatedly even spread, improve the uniformity of photosensitive slurry, relative to once smearing in conventional method, not only reduce thickness and the use amount of photosensitive slurry, and shorten the time of himself drying, improve production efficiency.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
Pcb board manufacturing method of screen, carries out successively according to following steps:
(A1) first that the cull on screen frame or garbage-cleaning is clean, choose a first-class primer of burnishing surface, park 30 minutes, make primer dry through;
(A2) inner side is recalled to by dry for net puller four limit pulling force, first screen frame is put into and draws in the net on table top, and then grenadine is clipped in the clamping plate on net puller four limit, and the distance between clamping plate and clamping plate keeps in the same size, keep smooth during grenadine gripping, more than corner grenadine is inside, go out 1-2cm;
(A3) grenadine clip rear beginning first time draw in the net, four limit stayed masts are at the uniform velocity stretched one by one, first draw warp direction, then draw weft direction, first time tensile stress be after 20-30N; Leave standstill and within 10-15 minute, draw second time again, second time tensile stress is after 30-38N; Leave standstill and within 10-15 minute, draw third time again, tensile stress is 38-45N and after the maintenance evenly of adjustment four limit tension force, leaves standstill 20-30 minute for the third time;
(A4) rise screen frame gluing, first with hairbrush, glue be evenly coated in grenadine and screen frame overlapping position, then carry out scraping once with frictioning, after glue dries 5-8 minute more heavily gluing once, drying 30 minutes after secondary gluing;
(A5) off line, remove unnecessary grenadine with scissors or blade, and on half tone, mark deadline and off line tension force, in screen frame, mend limit glue sealing with red, treat that net is enclosed on screen frame and grenadine bonding plane with animal glue before use;
(A6) leave standstill deposit, drawn in the net rear leave standstill deposit 48-72 hour;
(B1) first carry out degrease process with net washing water or liquid detergent, then rinse well with hydraulic giant afterwards;
(B2) old half tone moves back film process: return waiting the old half tone washed, and puts into the good stripping powder liquid medicine tank of pre-coordination and soaks 5 ~ 15 minutes;
(B3) after edition film dissolves, take out half tone, and rinse with hydraulic giant;
(B4) remove the residual stain ink on half tone again with net washing water erasing, use ghost cream and liquid detergent to carry out degrease ghost, and rinse with hydraulic giant;
(B5) half tone cleaned up is dried ponding, be put in baking box and carry out baking 5-15 minute with the temperature of 40 DEG C-50 DEG C, take out after moisture is dried;
(C1) be spread evenly across on the printing surface of half tone with scraping stock tank by photosensitive slurry good for pre-coordination, general circuit and character net coating 2-3 time, welding resistance are coated with 2 ~ 4 times, then photosensitive slurry good for pre-coordination are spread evenly across blade face 2-3 time;
(C2) light-sensitive surface is dry: be put in baking box by the half tone of coated photosensitive slurry, toast with the temperature of 40 DEG C ~ 50 DEG C, baking time controls at 15 ~ 20 minutes;
(D1) first that board removing surface is clean, then facing up of egative film film film figure is placed on exposure machine glass surface, half tone middle position placed by film egative film;
(D2) use the firm egative film of adhesive tape, then throw in half tone contraposition, then put down upper cover and carry out extracting vacuum, open Exposing Lamp, will set the time for exposure in scope needed for corresponding half tone, behind perfect vacuum, start exposure;
(D3) expose complete taking-up half tone and egative film, half tone running water drenches version one time, then carries out bath development;
(E1) first with running water half tone drenched before bath development and uses high pressure water flushing print layout again, until image visualization, then with more weak hydraulic pressure continue to rinse printing surface domain until figure and picture manifest clear till;
(E2) dry around half tone with towel more than water, and low force blots the globule on edition face;
(E3) after development half tone dries, carry out half tone inspection, qualified half tone, close the outer surrounding printing opacity grenadine of domain with block slurry, stoped ink, defective, place under repair, when cannot place under repair, again will return and do.
Should be noted that following problem in the process: have allergic person, Rubber gloves operation need be worn, prevent net washing water and demoulding/degumming water; Half tone makes and must carry out under amber light; Half tone make-up room environment should keep neat clean; Exposure machine glass can not have stain and serious flower scar of wiping to block printing opacity, will use alcohol wipe glass transparent, in order to avoid affect photosensitive imaging before exposure; All nets newly drawn should identify mesh number and concrete deadline, can use after new net should place 48-72 hour after the grenadine loss of tension is solid; Light slurry and pad pasting before net, all will through half tone pre-treatment; Use the egative film film all to have to pass through and check that confirmation can be manufactured; When using online photosensitive slurry, first from net bottom face, operation, to front, makes it front half tone medicine film and is pressed onto net bottom face generation stereoeffect, reach silk-screen requirement effect; Each photosensitive slurry, must keep the even thickness of medicine film basically identical; The figure of the fine and closely woven lines of circuit prevents pattern line from occurring zigzag with oblique net making; Peelable blue gel uses the photosensitive slurry of water film collocation superposition, photosensitive slurry 2-3 time on front, photosensitive slurry 4-5 time on net bottom face; All version films can carry out exposure operation after will thoroughly drying, and roasting the temperature inside the box must not more than 50 DEG C; Just can expose after bleeding and half tone is completely fixed; When half tone makes bath, the time should not be long, in order to avoid cause bath not penetrating, excessively, punching is hindered, washed out image shadow in bath; Pad pasting and starching requirement and exposure energy parameter; The domain of half tone is consistent with egative film, and not do not elongate, shorten, walk, shine anti-, underdevelop, the problems such as overdevelop, ensure that figure is complete; Wire diameter, line gap and cycle, font meet the requirements; The spreadability of version film and adhesive force want good, problems such as not having pin hole, light leak, be separated, come off; Circuit half tone makes inspection and uses 10 times of magnifying glasses if desired, checks whether circuit cabling has waveform, dog dental phenomenon; Pin hole and a little demoulding point, can utilize block to starch and repair; Through the half tone be up to the standards, must standard or stick the number-mark of product, rear transfer production and application; Workplace is forbidden to carry kindling material; Screen frame picks and places must handle with care, carefully bursts; Maintenance working environment is clean, clean and tidy, and machine keeps clean, film egative film must be put neatly.
The above is only preferred embodiment of the present invention, not does any pro forma restriction to the present invention, every according in technical spirit of the present invention to any simple modification, equivalent variations that above embodiment is done, all fall within protection scope of the present invention.
Claims (6)
1.PCB plate manufacturing method of screen, is characterized in that, carries out successively according to following steps: (A) draws in the net; (B) net is washed; (C) light-sensitive surface is coated with; (D) expose; (E) develop.
2. pcb board manufacturing method of screen according to claim 1, is characterized in that, described step (A) draws in the net to comprise the following steps:
(A1) first that the cull on screen frame or garbage-cleaning is clean, choose a first-class primer of burnishing surface, park 30 minutes, make primer dry through;
(A2) inner side is recalled to by dry for net puller four limit pulling force, first screen frame is put into and draws in the net on table top, and then grenadine is clipped in the clamping plate on net puller four limit, and the distance between clamping plate and clamping plate keeps in the same size, keep smooth during grenadine gripping, more than corner grenadine is inside, go out 1-2cm;
(A3) grenadine clip rear beginning first time draw in the net, four limit stayed masts are at the uniform velocity stretched one by one, first draw warp direction, then draw weft direction, first time tensile stress be after 20-30N; Leave standstill and within 10-15 minute, draw second time again, second time tensile stress is after 30-38N; Leave standstill and within 10-15 minute, draw third time again, tensile stress is 38-45N and after the maintenance evenly of adjustment four limit tension force, leaves standstill 20-30 minute for the third time;
(A4) rise screen frame gluing, first with hairbrush, glue be evenly coated in grenadine and screen frame overlapping position, then carry out scraping once with frictioning, after glue dries 5-8 minute more heavily gluing once, drying 30 minutes after secondary gluing;
(A5) off line, remove unnecessary grenadine with scissors or blade, and on half tone, mark deadline and off line tension force, in screen frame, mend limit glue sealing with red, treat that net is enclosed on screen frame and grenadine bonding plane with animal glue before use;
(A6) leave standstill deposit, drawn in the net rear leave standstill deposit 48-72 hour.
3. pcb board manufacturing method of screen according to claim 1, is characterized in that: described step (B) is washed net and comprised the following steps:
(B1) first carry out degrease process with net washing water or liquid detergent, then rinse well with hydraulic giant afterwards;
(B2) old half tone moves back film process: return waiting the old half tone washed, and puts into the good stripping powder liquid medicine tank of pre-coordination and soaks 5 ~ 15 minutes;
(B3) after edition film dissolves, take out half tone, and rinse with hydraulic giant;
(B4) remove the residual stain ink on half tone again with net washing water erasing, use ghost cream and liquid detergent to carry out degrease ghost, and rinse with hydraulic giant;
(B5) half tone cleaned up is dried ponding, be put in baking box and carry out baking 5-15 minute with the temperature of 40 DEG C-50 DEG C, take out after moisture is dried.
4. pcb board manufacturing method of screen according to claim 1, is characterized in that: described step (C) is coated with light-sensitive surface and comprises the following steps:
(C1) be spread evenly across on the printing surface of half tone with scraping stock tank by photosensitive slurry good for pre-coordination, general circuit and character net coating 2-3 time, welding resistance are coated with 2 ~ 4 times, then photosensitive slurry good for pre-coordination are spread evenly across blade face 2-3 time;
(C2) light-sensitive surface is dry: be put in baking box by the half tone of coated photosensitive slurry, toast with the temperature of 40 DEG C ~ 50 DEG C, baking time controlled at 15 ~ 20 minutes.
5. pcb board manufacturing method of screen as claimed in any of claims 1 to 4, is characterized in that: described step (D) exposure comprises the following steps:
(D1) first that board removing surface is clean, then facing up of egative film film film figure is placed on exposure machine glass surface, half tone middle position placed by film egative film;
(D2) use the firm egative film of adhesive tape, then throw in half tone contraposition, then put down upper cover and carry out extracting vacuum, open Exposing Lamp, will set the time for exposure in scope needed for corresponding half tone, behind perfect vacuum, start exposure;
(D3) expose complete taking-up half tone and egative film, half tone running water drenches version one time, then carries out bath development.
6. pcb board manufacturing method of screen as claimed in any of claims 1 to 4, is characterized in that: described step (E) development comprises the following steps:
(E1) first with running water half tone drenched before bath development and uses high pressure water flushing print layout again, until image visualization, then with more weak hydraulic pressure continue to rinse printing surface domain until figure and picture manifest clear till;
(E2) dry around half tone with towel more than water, and low force blots the globule on edition face;
(E3) after development half tone dries, carry out half tone inspection, qualified half tone, close the outer surrounding printing opacity grenadine of domain with block slurry, stoped ink, defective, place under repair, when cannot place under repair, again will return and do.
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Cited By (26)
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CN105034546A (en) * | 2015-08-18 | 2015-11-11 | 四川海英电子科技有限公司 | Manufacturing technology of screen for production of circuit board |
CN105172323A (en) * | 2015-08-14 | 2015-12-23 | 湖北建浩科技有限公司 | Method for manufacturing silk-screen printing plate for printed circuit board (PCB) solder mask process |
CN105388711A (en) * | 2015-12-18 | 2016-03-09 | 景旺电子科技(龙川)有限公司 | Exposure technology of resistance welding screen printing plate |
CN105517366A (en) * | 2015-12-18 | 2016-04-20 | 景旺电子科技(龙川)有限公司 | Aluminum substrate resistance welding screen making method for preventing photosensitive slurry from falling off |
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2013
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CN110430690A (en) * | 2019-07-31 | 2019-11-08 | 高德(无锡)电子有限公司 | It is a kind of applied to the technique for meeting pcb board peelable glue minimum thickness |
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