CN117438395A - Semiconductor device having pad structure for resisting plasma damage and method of manufacturing the same - Google Patents
Semiconductor device having pad structure for resisting plasma damage and method of manufacturing the same Download PDFInfo
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- CN117438395A CN117438395A CN202210819941.2A CN202210819941A CN117438395A CN 117438395 A CN117438395 A CN 117438395A CN 202210819941 A CN202210819941 A CN 202210819941A CN 117438395 A CN117438395 A CN 117438395A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000004020 conductor Substances 0.000 claims abstract description 145
- 239000010410 layer Substances 0.000 claims abstract description 103
- 229910052751 metal Inorganic materials 0.000 claims abstract description 52
- 239000002184 metal Substances 0.000 claims abstract description 52
- 239000011229 interlayer Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims description 41
- 238000005304 joining Methods 0.000 claims description 19
- 238000000059 patterning Methods 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 238000009713 electroplating Methods 0.000 claims description 10
- 229910044991 metal oxide Inorganic materials 0.000 claims description 7
- 150000004706 metal oxides Chemical class 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910000679 solder Inorganic materials 0.000 claims 1
- 238000005137 deposition process Methods 0.000 description 11
- 238000005530 etching Methods 0.000 description 10
- 238000001459 lithography Methods 0.000 description 9
- 239000011241 protective layer Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- -1 but not limited to Substances 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 238000007517 polishing process Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000000609 electron-beam lithography Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/482—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of lead-in layers inseparably applied to the semiconductor body (electrodes)
- H01L23/485—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of lead-in layers inseparably applied to the semiconductor body (electrodes) consisting of layered constructions comprising conductive layers and insulating layers, e.g. planar contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76853—Barrier, adhesion or liner layers characterized by particular after-treatment steps
- H01L21/76855—After-treatment introducing at least one additional element into the layer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76895—Local interconnects; Local pads, as exemplified by patent document EP0896365
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Abstract
Description
技术领域Technical field
本发明涉及具有抵抗电浆伤害的焊垫结构的半导体元件及其制造方法,特别涉及使主焊垫部及子焊垫部仅经由桥接焊垫单元与焊垫接合单元连接的具有抵抗电浆伤害的焊垫结构的半导体元件及其制造方法。The present invention relates to a semiconductor element with a pad structure that is resistant to plasma damage and a manufacturing method thereof. In particular, it relates to a semiconductor element with a pad structure that is resistant to plasma damage, and particularly relates to a device that has a pad structure that is resistant to plasma damage and connects a main pad portion and a sub-pad portion to a pad bonding unit only through a bridge pad unit. Semiconductor components with pad structures and manufacturing methods thereof.
背景技术Background technique
请参考图1,其是显示已知半导体元件的焊垫结构的剖视示意图。如图1所示,此已知的半导体元件的焊垫结构中每一层的金属层M13、M23、M33、M43,及连接每一层的金属层M13、M23、M33、M43的连接单元Via4,与每一层的介电层都对下方的金属氧化物半导体元件的栅极具有严重的电浆伤害效应(或称天线效应)。如此将会使下方的金属氧化物半导体元件的栅极容易被击穿而受损。Please refer to FIG. 1 , which is a schematic cross-sectional view showing a bonding pad structure of a known semiconductor device. As shown in Figure 1, the metal layers M13, M23, M33, M43 of each layer in the known pad structure of the semiconductor component, and the connection unit Via4 connecting the metal layers M13, M23, M33, M43 of each layer , and each dielectric layer has a severe plasma damage effect (or antenna effect) on the gate of the metal oxide semiconductor device below. This will make the gate of the metal oxide semiconductor device below easily broken down and damaged.
有鉴于此,本发明提出一种具有抵抗电浆伤害的焊垫结构的半导体元件及其制造方法,其可以有效降低电浆伤害效应。In view of this, the present invention proposes a semiconductor component with a pad structure resistant to plasma damage and a manufacturing method thereof, which can effectively reduce the plasma damage effect.
发明内容Contents of the invention
于一观点中,本发明提供了一种具有抵抗电浆伤害的焊垫结构的半导体元件,包括:一主焊垫部(main pad portion),包括对应形成于多个金属层中的多个主导体单元(main conductor unit)与对应形成于多个介电层中的多个主层间连接单元(main viaunit),其中多个该主层间连接单元对应电连接多个该主导体单元,而使多个该主导体单元彼此电连接;一子焊垫部(sub-pad portion),包括对应形成于多个该金属层中的多个子导体单元(sub-conductor unit)与对应形成于多个该介电层中的多个子层间连接单元(sub-via unit),其中多个该子层间连接单元对应电连接多个该子导体单元,而使多个该子导体单元彼此电连接,且该子焊垫部电连接至少一金属氧化物半导体(MOS)元件的栅极;一焊垫接合单元(pad bonding unit),与一顶主导体单元直接接触且连接,其中该顶主导体单元是形成于最上方的该金属层中的该主导体单元;以及一桥接焊垫单元(bridge pad unit),与一顶子导体单元直接接触且连接,其中该顶子导体单元是形成于最上方的该金属层中的该子导体单元;其中该桥接焊垫单元与该焊垫接合单元直接接触且连接;其中该主焊垫部与该子焊垫部分别位于该焊垫接合单元与该桥接焊垫单元下方,且该主焊垫部与该子焊垫部彼此不直接连接。In one aspect, the present invention provides a semiconductor device with a bonding pad structure that is resistant to plasma damage, including: a main pad portion including a plurality of main pads formed in a plurality of metal layers. a main conductor unit and a plurality of main interlayer connection units (main viaunits) correspondingly formed in a plurality of dielectric layers, wherein a plurality of the main interlayer connection units are electrically connected to a plurality of the main conductor units, and A plurality of the main conductor units are electrically connected to each other; a sub-pad portion includes a plurality of sub-conductor units (sub-conductor units) correspondingly formed in a plurality of the metal layers and a plurality of corresponding sub-conductor units formed in the plurality of metal layers. a plurality of inter-layer connection units (sub-via units) in the dielectric layer, wherein a plurality of the sub-layer connection units are electrically connected to a plurality of the sub-conductor units, so that a plurality of the sub-conductor units are electrically connected to each other, And the sub-pad portion is electrically connected to the gate of at least one metal oxide semiconductor (MOS) component; a pad bonding unit is in direct contact with and connected to a top main conductor unit, wherein the top main conductor unit It is the main conductor unit formed in the uppermost metal layer; and a bridge pad unit directly contacts and connects to a top sub-conductor unit, wherein the top sub-conductor unit is formed in the top The sub-conductor unit in the metal layer; wherein the bridge pad unit is in direct contact with and connected to the pad joining unit; wherein the main pad part and the sub-pad part are respectively located between the pad joining unit and the bridge Below the bonding pad unit, the main bonding pad part and the sub-bonding pad part are not directly connected to each other.
于另一观点中,本发明提供了一种具有抵抗电浆伤害的焊垫结构的半导体元件的制造方法,包括:以一图案化工艺步骤,形成一主焊垫部与一子焊垫部,其中该主焊垫部包括对应形成于多个金属层中的多个主导体单元与对应形成于多个介电层中的多个主层间连接单元,其中多个该主层间连接单元对应电连接多个该主导体单元,而使多个该主导体单元彼此电连接,其中该子焊垫部包括对应形成于多个该金属层中的多个子导体单元与对应形成于多个该介电层中的多个子层间连接单元,其中多个该子层间连接单元对应电连接多个该子导体单元,而使多个该子导体单元彼此电连接,且该子焊垫部电连接至少一MOS元件的栅极;形成一焊垫接合单元(pad bonding unit),使得该焊垫接合单元与一顶主导体单元直接接触且连接,其中该顶主导体单元是形成于最上方的该金属层中的该主导体单元;以及形成一桥接焊垫单元(bridge pad unit),使得该桥接焊垫单元与一顶子导体单元直接接触且连接,其中该顶子导体单元是形成于最上方的该金属层中的该子导体单元;其中该桥接焊垫单元与该焊垫接合单元直接接触且连接;其中该主焊垫部与该子焊垫部分别位于该焊垫接合单元与该桥接焊垫单元下方,且该主焊垫部与该子焊垫部彼此不直接连接。In another aspect, the present invention provides a method for manufacturing a semiconductor component with a bonding pad structure that is resistant to plasma damage, including: using a patterning process step to form a main bonding pad portion and a sub-bonding pad portion, The main pad portion includes a plurality of main conductor units correspondingly formed in a plurality of metal layers and a plurality of main inter-layer connection units correspondingly formed in a plurality of dielectric layers, wherein the plurality of main inter-layer connection units correspond to The plurality of main conductor units are electrically connected to each other, wherein the sub-pad portion includes a plurality of sub-conductor units correspondingly formed in a plurality of the metal layers and a plurality of correspondingly formed in the plurality of vias. A plurality of sub-layer connection units in the electrical layer, wherein a plurality of the sub-layer connection units are electrically connected to a plurality of the sub-conductor units, so that the plurality of sub-conductor units are electrically connected to each other, and the sub-bonding pad portion is electrically connected The gate of at least one MOS device; forming a pad bonding unit so that the pad bonding unit directly contacts and connects to a top main conductor unit, wherein the top main conductor unit is formed on the top The main conductor unit in the metal layer; and forming a bridge pad unit so that the bridge pad unit is in direct contact and connected with a top sub-conductor unit, wherein the top sub-conductor unit is formed on the top The sub-conductor unit in the metal layer; wherein the bridge pad unit is in direct contact with and connected to the pad joining unit; wherein the main pad part and the sub-pad part are respectively located between the pad joining unit and the bridge Below the bonding pad unit, the main bonding pad part and the sub-bonding pad part are not directly connected to each other.
于一实施例中,该子导体单元环绕形成于同一该金属层中的对应的该主导体单元。In one embodiment, the sub-conductor unit surrounds the corresponding main conductor unit formed in the same metal layer.
于一实施例中,该子导体单元不环绕形成于同一该金属层中的对应的该主导体单元,而是位在形成于同一该金属层中的对应的该主导体单元外侧,并具有一点状结构。In one embodiment, the sub-conductor unit does not surround the corresponding main conductor unit formed in the same metal layer, but is located outside the corresponding main conductor unit formed in the same metal layer and has a point shape structure.
于一实施例中,每一该主导体单元的表面积大于每一该子导体单元的表面积。In one embodiment, the surface area of each main conductor unit is greater than the surface area of each sub-conductor unit.
于一实施例中,多个该子导体单元的表面积与该栅极的表面积间的比例,低于一预设天线设计规范比例。In one embodiment, the ratio between the surface area of the plurality of sub-conductor units and the surface area of the gate is lower than a predetermined antenna design specification ratio.
于一实施例中,该焊垫接合单元与该桥接焊垫单元形成于位在该主焊垫部与该子焊垫部上的一重分布层(redistribution layer,RDL)中,且该重分布层与最上方的该金属层直接连接。In one embodiment, the pad bonding unit and the bridge pad unit are formed in a redistribution layer (RDL) located on the main pad part and the sub-pad part, and the redistribution layer Directly connected to the top metal layer.
于一实施例中,该主导体单元与该子导体单元的材质为铜或铝。In one embodiment, the main conductor unit and the sub-conductor unit are made of copper or aluminum.
于一实施例中,该焊垫接合单元与该桥接焊垫单元的材质为铝。In one embodiment, the pad joining unit and the bridging pad unit are made of aluminum.
于一实施例中,该桥接焊垫单元与该焊垫接合单元是利用电镀工艺步骤形成。In one embodiment, the bridge pad unit and the pad joining unit are formed using electroplating process steps.
本发明的优点为本发明通过利用电镀工艺步骤形成焊垫接合单元与桥接焊垫单元且使主焊垫部与子焊垫部之间仅通过焊垫接合单元与桥接焊垫单元连接,可显著降低电浆伤害。The advantage of the present invention is that the present invention uses electroplating process steps to form the pad joining unit and the bridge pad unit, and the main pad part and the sub-pad part are connected only through the pad joining unit and the bridge pad unit, which can significantly Reduce plasma damage.
以下通过具体实施例详加说明,会更容易了解本发明的目的、技术内容、特点及其所实现的效果。It will be easier to understand the purpose, technical content, characteristics and achieved effects of the present invention through detailed description below through specific embodiments.
附图说明Description of the drawings
图1是显示已知半导体元件的焊垫结构的剖视示意图。FIG. 1 is a schematic cross-sectional view showing a bonding pad structure of a known semiconductor device.
图2是根据本发明的一实施例显示具有抵抗电浆伤害的焊垫结构的半导体元件的剖视示意图。FIG. 2 is a schematic cross-sectional view showing a semiconductor device having a bonding pad structure that resists plasma damage according to an embodiment of the present invention.
图3是根据本发明的一实施例显示具有抵抗电浆伤害的焊垫结构的半导体元件的俯视示意图。3 is a schematic top view showing a semiconductor device having a bonding pad structure that resists plasma damage according to an embodiment of the present invention.
图4是根据本发明的另一实施例显示具有抵抗电浆伤害的焊垫结构的半导体元件的俯视示意图。4 is a schematic top view showing a semiconductor device having a bonding pad structure that resists plasma damage according to another embodiment of the present invention.
图5A-图5Q根据本发明的实施例显示具有抵抗电浆伤害的焊垫结构的半导体元件的制造方法的剖视示意图。5A-5Q illustrate a schematic cross-sectional view of a manufacturing method of a semiconductor device having a bonding pad structure resistant to plasma damage according to an embodiment of the present invention.
图中符号说明Explanation of symbols in the figure
20:具有抵抗电浆伤害的焊垫结构的半导体元件20: Semiconductor components with pad structures resistant to plasma damage
201:主焊垫部201: Main soldering pad part
2011:主导体单元2011: Main Conductor Unit
2011a,2021a:宽通孔2011a, 2021a: Wide vias
2012:主层间连接单元2012: Main inter-floor connection unit
2012a,2022a:窄通孔2012a, 2022a: Narrow vias
202:子焊垫部202: Sub-soldering pad part
2021:子导体单元2021: Subconductor Unit
2022:子层间连接单元2022: Inter-sublayer connection unit
203,M13,M23,M33,M43:金属层203, M13, M23, M33, M43: metal layer
204:介电层204: Dielectric layer
205:焊垫接合单元205: Pad bonding unit
206:桥接焊垫单元206: Bridge Pad Unit
207:保护层207: Protective layer
208:聚合物层208: Polymer layer
209:栅极209: Gate
210:导电插栓210: Conductive plug
Via4:连接单元Via4: connection unit
具体实施方式Detailed ways
有关本发明的前述及其他技术内容、特点与效果,在以下配合参考附图的较佳实施例的详细说明中,将可清楚地呈现。本发明中的附图均属示意,主要意在表示工艺步骤以及各层之间的上下次序关系,至于形状、厚度与宽度则并未依照比例绘制。The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the accompanying drawings. The drawings in the present invention are all schematic, and are mainly intended to represent the process steps and the upper and lower order relationships between the layers. As for the shape, thickness and width, they are not drawn to scale.
图2是根据本发明的一实施例显示具有抵抗电浆伤害的焊垫结构的半导体元件的剖视示意图。如图2所示,本发明的具有抵抗电浆伤害的焊垫结构的半导体元件20包括主焊垫部(main pad portion)201、子焊垫部(sub-pad portion)202、焊垫接合单元(padbonding unit)205及桥接焊垫单元(bridge pad unit)206。主焊垫部201包括对应形成于多个金属层203中的多个主导体单元(main conductor unit)2011与对应形成于多个介电层204中的多个主层间连接单元(main via unit)2012。多个主层间连接单元2012对应电连接多个主导体单元2011,而使多个主导体单元2011彼此电连接。子焊垫部202包括对应形成于多个金属层203中的多个子导体单元(sub-conductor unit)2021与对应形成于多个介电层204中的多个子层间连接单元(sub-via unit)2022。多个子层间连接单元2022对应电连接多个子导体单元2021,而使多个子导体单元2021彼此电连接。子焊垫部202例如通过一导电插栓210电连接至少一金属氧化物半导体(MOS)元件的栅极209。FIG. 2 is a schematic cross-sectional view showing a semiconductor device having a bonding pad structure that resists plasma damage according to an embodiment of the present invention. As shown in FIG. 2 , the semiconductor component 20 with a pad structure resistant to plasma damage of the present invention includes a main pad portion 201 , a sub-pad portion 202 , and a pad bonding unit. (padbonding unit) 205 and bridge pad unit (bridge pad unit) 206. The main pad portion 201 includes a plurality of main conductor units 2011 correspondingly formed in a plurality of metal layers 203 and a plurality of main interlayer connection units (main via units) correspondingly formed in a plurality of dielectric layers 204 )2012. The plurality of main interlayer connection units 2012 are electrically connected to the plurality of main conductor units 2011 correspondingly, so that the plurality of main conductor units 2011 are electrically connected to each other. The sub-pad portion 202 includes a plurality of sub-conductor units 2021 formed in a plurality of metal layers 203 and a plurality of sub-via units formed in a plurality of dielectric layers 204 . )2022. The plurality of sub-layer connection units 2022 are electrically connected to the plurality of sub-conductor units 2021 correspondingly, so that the plurality of sub-conductor units 2021 are electrically connected to each other. The sub-pad portion 202 is electrically connected to the gate 209 of at least one metal oxide semiconductor (MOS) device, for example, through a conductive plug 210 .
焊垫接合单元(pad bonding unit)205与顶主导体单元直接接触且连接。顶主导体单元是形成于最上方的金属层203中的主导体单元2011。桥接焊垫单元(bridge padunit)206与顶子导体单元直接接触且连接。顶子导体单元是形成于最上方的金属层203中的子导体单元2021。桥接焊垫单元206与焊垫接合单元205直接接触且连接。主焊垫部201与子焊垫部202分别位于焊垫接合单元205与桥接焊垫单元206下方,且主焊垫部201与子焊垫部202彼此不直接连接。保护层(passivation layer)207形成于介电层204的上表面上,且部分的保护层207形成于部分的顶主导体单元及部分的顶子导体单元之上。选择性地,聚合物层(polymer layer)208形成于保护层207之上,且部分的聚合物层208形成于部分的焊垫接合单元205及桥接焊垫单元(bridge pad unit)206之上。如图2所示,主焊垫部201上的保护层207的开口范围大于子焊垫部202上的保护层207的开口范围,由此可使子焊垫部202处所产生的电浆密度较低,使其所连接的待测物例如MOS元件的栅极209所受到的电浆伤害较小。The pad bonding unit 205 is in direct contact with and connected to the top main conductor unit. The top main conductor unit is the main conductor unit 2011 formed in the uppermost metal layer 203 . The bridge pad unit 206 is in direct contact with and connected to the top sub-conductor unit. The top sub-conductor unit is the sub-conductor unit 2021 formed in the uppermost metal layer 203 . The bridge pad unit 206 is in direct contact with and connected to the pad bonding unit 205 . The main pad part 201 and the sub-pad part 202 are respectively located under the pad joining unit 205 and the bridge pad unit 206, and the main pad part 201 and the sub-pad part 202 are not directly connected to each other. A passivation layer 207 is formed on the upper surface of the dielectric layer 204, and part of the passivation layer 207 is formed on part of the top main conductor unit and part of the top sub-conductor unit. Optionally, a polymer layer 208 is formed on the protective layer 207 , and part of the polymer layer 208 is formed on part of the pad bonding unit 205 and the bridge pad unit 206 . As shown in FIG. 2 , the opening range of the protective layer 207 on the main bonding pad portion 201 is larger than the opening range of the protective layer 207 on the sub-bonding pad portion 202 , thereby making the plasma density generated at the sub-bonding pad portion 202 smaller. Low, so that the object under test connected to it, such as the gate 209 of the MOS device, is less damaged by the plasma.
于一实施例中,每一主导体单元2011的表面积大于每一子导体单元2021的表面积。于一实施例中,多个子导体单元2021的表面积与栅极209的表面积间的比例低于一预设天线设计规范(antenna design rule)比例。于一实施例中,焊垫接合单元205与桥接焊垫单元206形成于位在主焊垫部201与子焊垫部202上的重分布层(redistribution layer,RDL)中,且重分布层与最上方的金属层203直接连接。于一实施例中,主导体单元2011与子导体单元2021的材质例如但不限于为铜或铝。于一实施例中,焊垫接合单元205与桥接焊垫单元206的材质例如但不限于为铝。In one embodiment, the surface area of each main conductor unit 2011 is larger than the surface area of each sub-conductor unit 2021. In one embodiment, the ratio between the surface area of the plurality of sub-conductor units 2021 and the surface area of the gate 209 is lower than a predetermined antenna design rule ratio. In one embodiment, the pad bonding unit 205 and the bridge pad unit 206 are formed in a redistribution layer (RDL) located on the main pad part 201 and the sub-pad part 202, and the redistribution layer and The uppermost metal layer 203 is directly connected. In one embodiment, the main conductor unit 2011 and the sub-conductor unit 2021 are made of materials such as, but not limited to, copper or aluminum. In one embodiment, the material of the pad bonding unit 205 and the bridge pad unit 206 is, for example but not limited to, aluminum.
需说明的是,在形成半导体元件的焊垫结构的工艺步骤中,若半导体基板中的金属氧化物半导体元件的栅极与焊垫结构的一部分,在对应的工艺步骤中有电连接关系,则预设天线设计规范限制在此工艺步骤中,形成焊垫结构的该部分所构成的天线与栅极面积比,以此预设天线设计规范避免对栅极造成过度的电浆伤害。It should be noted that in the process steps of forming the bonding pad structure of the semiconductor element, if the gate of the metal oxide semiconductor element in the semiconductor substrate and part of the bonding pad structure are electrically connected in the corresponding process step, then The preset antenna design specification limits the area ratio of the antenna to the gate formed by the portion of the bonding pad structure formed in this process step, so as to avoid excessive plasma damage to the gate.
图3是根据本发明的一实施例显示具有抵抗电浆伤害的焊垫结构的半导体元件的俯视示意图。于一实施例中,如图3所示,子导体单元2021环绕形成于同一金属层203中的对应的主导体单元2011。图4是根据本发明的另一实施例显示具有抵抗电浆伤害的焊垫结构的半导体元件的俯视示意图。于另一实施例中,如图4所示,子导体单元2021不环绕形成于同一金属层203中的对应的主导体单元2011,而是位在形成于同一金属层203中的对应的主导体单元2011外侧,并具有点状结构。3 is a schematic top view showing a semiconductor device having a bonding pad structure that resists plasma damage according to an embodiment of the present invention. In one embodiment, as shown in FIG. 3 , the sub-conductor units 2021 surround the corresponding main conductor unit 2011 formed in the same metal layer 203 . 4 is a schematic top view showing a semiconductor device having a bonding pad structure that resists plasma damage according to another embodiment of the present invention. In another embodiment, as shown in FIG. 4 , the sub-conductor unit 2021 does not surround the corresponding main conductor unit 2011 formed in the same metal layer 203 , but is located in the corresponding main conductor formed in the same metal layer 203 . Outside unit 2011, and has a point-like structure.
图5A-图5Q根据本发明的实施例显示具有抵抗电浆伤害的焊垫结构的半导体元件的制造方法的剖视示意图。首先,如图5A所示,形成金属氧化物半导体元件并利用例如沉积工艺步骤形成介电层204,且利用图案化工艺步骤例如但不限于微影及蚀刻工艺步骤及沉积工艺步骤形成导电插栓210,以耦接于MOS元件的栅极209上。接着,如图5B所示,继续利用例如沉积工艺步骤形成介电层204。之后,如图5C所示,利用图案化工艺步骤例如但不限于微影及蚀刻工艺步骤及沉积工艺步骤或电镀工艺步骤形成主导体单元2011于金属层203中并形成子导体单元2021于金属层203中。接续,如图5D所示,继续利用例如沉积工艺步骤形成介电层204。5A-5Q illustrate a schematic cross-sectional view of a manufacturing method of a semiconductor device having a bonding pad structure resistant to plasma damage according to an embodiment of the present invention. First, as shown in FIG. 5A , a metal oxide semiconductor device is formed and a dielectric layer 204 is formed using, for example, deposition process steps, and conductive plugs are formed using patterning process steps, such as but not limited to photolithography and etching process steps and deposition process steps. 210 to be coupled to the gate 209 of the MOS device. Next, as shown in FIG. 5B , the dielectric layer 204 is formed using, for example, deposition process steps. Thereafter, as shown in FIG. 5C , patterning process steps such as but not limited to lithography and etching process steps, deposition process steps or electroplating process steps are used to form the main conductor unit 2011 in the metal layer 203 and to form the sub-conductor unit 2021 in the metal layer. 203 in. Next, as shown in FIG. 5D , the dielectric layer 204 is formed using, for example, deposition process steps.
接着,如图5E所示,于一实施例中,先利用图案化工艺步骤例如但不限于微影及蚀刻工艺步骤形成用以容纳主层间连接单元及子层间连接单元的窄通孔2012a及2022a,之后再如图5G所示,利用图案化工艺步骤例如但不限于微影及蚀刻工艺步骤形成用以容纳主导体单元及子导体单元的宽通孔2011a及2021a。于一替代性实施例中,如图5F所示,也可先利用图案化工艺步骤例如但不限于微影及蚀刻工艺步骤形成用以容纳主导体单元及子导体单元的宽通孔2011a及2021a,之后如图5G所示,利用图案化工艺步骤例如但不限于微影及蚀刻工艺步骤形成用以容纳主层间连接单元及子层间连接单元的窄通孔2012a及2022a。Next, as shown in FIG. 5E , in one embodiment, patterning process steps such as but not limited to photolithography and etching process steps are first used to form narrow via holes 2012a for accommodating the main inter-layer connection unit and the sub-inter-layer connection unit. and 2022a, and then as shown in FIG. 5G, patterning process steps such as but not limited to lithography and etching process steps are used to form wide through holes 2011a and 2021a to accommodate the main conductor unit and the sub-conductor unit. In an alternative embodiment, as shown in FIG. 5F , patterning process steps such as but not limited to lithography and etching process steps may also be used to form wide through holes 2011a and 2021a for accommodating the main conductor unit and the sub-conductor unit. , and then as shown in FIG. 5G , patterning process steps such as but not limited to lithography and etching process steps are used to form narrow through holes 2012a and 2022a for accommodating the main interlayer connection unit and the sub-interlayer connection unit.
接着,如图5H所示,利用例如沉积工艺步骤分别形成主层间连接单元2012及子层间连接单元2022于窄通孔2012a及2022a中,且利用例如沉积工艺步骤或电镀工艺步骤分别形成主导体单元2011及子导体单元2021于宽通孔2011a及2021a中,以分别形成主导体单元2011及子导体单元2021于金属层203中,并利用例如化学机械研磨工艺步骤分别形成主层间连接单元2012及子层间连接单元2022于介电层204中。之后,如图5I所示,继续利用例如沉积工艺步骤形成介电层204。Next, as shown in FIG. 5H , the main interlayer connection unit 2012 and the sub-interlayer connection unit 2022 are respectively formed in the narrow through holes 2012a and 2022a using, for example, a deposition process step or an electroplating process step. The body unit 2011 and the sub-conductor unit 2021 are formed in the wide through holes 2011a and 2021a to respectively form the main conductor unit 2011 and the sub-conductor unit 2021 in the metal layer 203, and use chemical mechanical polishing process steps to form main inter-layer connection units respectively. 2012 and sub-layer connection unit 2022 in the dielectric layer 204 . Thereafter, as shown in FIG. 5I , the dielectric layer 204 is formed using, for example, deposition process steps.
接着,如图5J所示,于一实施例中,先利用图案化工艺步骤例如但不限于微影及蚀刻工艺步骤形成用以容纳主层间连接单元及子层间连接单元的窄通孔2012a及2022a,之后再如图5L所示,利用图案化工艺步骤例如但不限于微影及蚀刻工艺步骤形成用以容纳主导体单元及子导体单元的宽通孔2011a及2021a。于一替代性实施例中,如图5K所示,也可先利用图案化工艺步骤例如但不限于微影及蚀刻工艺步骤形成用以容纳主导体单元及子导体单元的宽通孔2011a及2021a,之后如图5L所示,利用图案化工艺步骤例如但不限于微影及蚀刻工艺步骤形成用以容纳主层间连接单元及子层间连接单元的窄通孔2012a及2022a。Next, as shown in FIG. 5J , in one embodiment, patterning process steps such as but not limited to photolithography and etching process steps are first used to form narrow via holes 2012a for accommodating the main inter-layer connection unit and the sub-inter-layer connection unit. and 2022a, and then as shown in FIG. 5L , patterning process steps such as but not limited to lithography and etching process steps are used to form wide through holes 2011a and 2021a for accommodating the main conductor unit and the sub-conductor unit. In an alternative embodiment, as shown in FIG. 5K , patterning process steps such as but not limited to lithography and etching process steps may also be used to form wide through holes 2011a and 2021a for accommodating the main conductor unit and the sub-conductor unit. , and then as shown in FIG. 5L , patterning process steps such as but not limited to lithography and etching process steps are used to form narrow through holes 2012a and 2022a for accommodating the main interlayer connection unit and the sub-interlayer connection unit.
接着,如图5M所示,利用例如沉积工艺步骤与化学机械研磨工艺步骤形成主层间连接单元2012及子层间连接单元2022于窄通孔2012a及2022a中,且利用例如沉积工艺步骤或电镀工艺步骤分别形成主导体单元2011及子导体单元2021于宽通孔2011a及2021a中,以分别形成主导体单元2011及子导体单元2021于金属层203中,并分别形成主层间连接单元2012及子层间连接单元2022于介电层204中。Next, as shown in FIG. 5M , the main interlayer connection unit 2012 and the sub-interlayer connection unit 2022 are formed in the narrow through holes 2012a and 2022a using, for example, deposition process steps and chemical mechanical polishing process steps, and use, for example, deposition process steps or electroplating. The process steps are to form the main conductor unit 2011 and the sub-conductor unit 2021 in the wide through holes 2011a and 2021a respectively, so as to form the main conductor unit 2011 and the sub-conductor unit 2021 in the metal layer 203 respectively, and to form the main inter-layer connection unit 2012 and the sub-conductor unit 2021 respectively. The inter-sub-layer connection unit 2022 is in the dielectric layer 204 .
之后,重复上述图5I至图5M的步骤,则如图5N所示,形成主焊垫部201与子焊垫部202,其中主焊垫部201包括对应形成于多个金属层203中的多个主导体单元2011与对应形成于多个介电层204中的多个主层间连接单元2012,其中多个主层间连接单元2012对应电连接多个主导体单元2011,而使多个主导体单元2011彼此电连接,其中子焊垫部202包括对应形成于多个金属层203中的多个子导体单元2021与对应形成于多个介电层204中的多个子层间连接单元2022,其中多个子层间连接单元2022对应电连接多个子导体单元2021,而使多个子导体单元2021彼此电连接,且子焊垫部202电连接至少一MOS元件的栅极209。Thereafter, the above-mentioned steps of FIGS. 5I to 5M are repeated, and as shown in FIG. 5N , the main bonding pad portion 201 and the sub-bonding pad portion 202 are formed. The main bonding pad portion 201 includes a plurality of corresponding metal layers 203 formed in the metal layers 203 . A main conductor unit 2011 and a plurality of main interlayer connection units 2012 correspondingly formed in a plurality of dielectric layers 204, wherein the plurality of main interlayer connection units 2012 are electrically connected to the plurality of main conductor units 2011, so that the plurality of main conductor units 2011 are electrically connected to each other. The body units 2011 are electrically connected to each other, wherein the sub-pad portion 202 includes a plurality of sub-conductor units 2021 correspondingly formed in a plurality of metal layers 203 and a plurality of sub-layer connection units 2022 correspondingly formed in a plurality of dielectric layers 204, wherein The plurality of inter-layer connection units 2022 are electrically connected to the plurality of sub-conductor units 2021 correspondingly, so that the plurality of sub-conductor units 2021 are electrically connected to each other, and the sub-pad portion 202 is electrically connected to the gate 209 of at least one MOS device.
接续,如图5O所示,利用例如沉积工艺步骤形成保护层207于介电层204上且部分形成于顶主导体单元及顶子导体单元上。接着,如图5P所示,形成焊垫接合单元205于保护层207上且部分形成于顶主导体单元上,并形成桥接焊垫单元206于保护层207上且部分形成于顶子导体单元上,使得焊垫接合单元205与顶主导体单元直接接触且连接,其中顶主导体单元是形成于最上方的金属层203中的主导体单元2011,并使得桥接焊垫单元206与顶子导体单元直接接触且连接,其中顶子导体单元是形成于最上方的金属层203中的子导体单元2021。Next, as shown in FIG. 5O , a protective layer 207 is formed on the dielectric layer 204 and partially on the top main conductor unit and the top sub-conductor unit using, for example, deposition process steps. Next, as shown in FIG. 5P , a pad bonding unit 205 is formed on the protective layer 207 and partially formed on the top main conductor unit, and a bridge pad unit 206 is formed on the protective layer 207 and partially formed on the top sub-conductor unit. , so that the pad bonding unit 205 is in direct contact with and connected to the top main conductor unit, where the top main conductor unit is the main conductor unit 2011 formed in the uppermost metal layer 203, and to bridge the pad unit 206 with the top sub-conductor unit Direct contact and connection, wherein the top sub-conductor unit is the sub-conductor unit 2021 formed in the uppermost metal layer 203.
桥接焊垫单元206与焊垫接合单元205直接接触且连接。主焊垫部201与子焊垫部202分别位于焊垫接合单元205与桥接焊垫单元206下方,且主焊垫部201与子焊垫部202彼此不直接连接。于一实施例中,焊垫接合单元205与桥接焊垫单元206形成于位在主焊垫部201与子焊垫部202上的重分布层(redistribution layer,RDL)中,且重分布层与最上方的金属层203直接连接。于一实施例中,主导体单元2011与子导体单元2021的材质例如但不限于为铜或铝。于一实施例中,焊垫接合单元205与桥接焊垫单元206的材质例如但不限于为铝。于一实施例中,焊垫接合单元205与桥接焊垫单元206可利用电镀工艺步骤及微影工艺步骤形成。由此利用电镀工艺步骤且使主焊垫部201与子焊垫部202之间仅通过焊垫接合单元205与桥接焊垫单元206接合,可显著降低电浆伤害。The bridge pad unit 206 is in direct contact with and connected to the pad bonding unit 205 . The main pad part 201 and the sub-pad part 202 are respectively located under the pad joining unit 205 and the bridge pad unit 206, and the main pad part 201 and the sub-pad part 202 are not directly connected to each other. In one embodiment, the pad bonding unit 205 and the bridge pad unit 206 are formed in a redistribution layer (RDL) located on the main pad part 201 and the sub-pad part 202, and the redistribution layer and The uppermost metal layer 203 is directly connected. In one embodiment, the main conductor unit 2011 and the sub-conductor unit 2021 are made of materials such as, but not limited to, copper or aluminum. In one embodiment, the material of the pad bonding unit 205 and the bridge pad unit 206 is, for example but not limited to, aluminum. In one embodiment, the pad bonding unit 205 and the bridge pad unit 206 may be formed using electroplating process steps and lithography process steps. Therefore, plasma damage can be significantly reduced by utilizing electroplating process steps and connecting the main pad portion 201 and the sub-pad portion 202 only through the pad bonding unit 205 and the bridge pad unit 206 .
之后,如图5Q所示,选择性地,利用例如沉积工艺步骤形成聚合物层208于保护层207之上,且部分形成于部分的焊垫接合单元205及桥接焊垫单元206之上。Thereafter, as shown in FIG. 5Q , a polymer layer 208 is selectively formed on the protective layer 207 using, for example, a deposition process step, and is partially formed on a portion of the pad bonding unit 205 and the bridge pad unit 206 .
如上所述,本发明通过利用电镀工艺步骤形成焊垫接合单元205与桥接焊垫单元206且使主焊垫部201与子焊垫部202之间仅通过焊垫接合单元205与桥接焊垫单元206接合,可显著降低电浆伤害。As mentioned above, the present invention uses electroplating process steps to form the pad bonding unit 205 and the bridge pad unit 206, and the main pad part 201 and the sub-pad part 202 are only connected by the pad bonding unit 205 and the bridge pad unit. 206 joint, which can significantly reduce plasma damage.
以上已针对较佳实施例来说明本发明,但以上所述,仅为使本领域技术人员易于了解本发明的内容,并非用来限定本发明的权利范围。在本发明的相同精神下,本领域技术人员可以想到各种等效变化。例如,在不影响元件主要的特性下,可加入其他工艺步骤或结构,如轻掺杂漏极区等;又如,微影技术并不限于光罩技术,也可包含电子束微影技术。凡此种种,都可根据本发明的教示类推而得。此外,所说明的各个实施例,并不限于单独应用,也可以组合应用,例如但不限于将两实施例并用。因此,本发明的范围应涵盖上述及其他所有等效变化。此外,本发明的任一实施型态不必须实现所有的目的或优点,因此,权利要求的任一项也不应以此为限。The present invention has been described above with reference to the preferred embodiments. However, the above description is only to make it easy for those skilled in the art to understand the content of the present invention, and is not intended to limit the scope of rights of the present invention. Within the same spirit of the present invention, various equivalent changes may be conceived by those skilled in the art. For example, without affecting the main characteristics of the component, other process steps or structures can be added, such as lightly doped drain regions; for another example, lithography technology is not limited to photomask technology, but can also include electron beam lithography technology. All these can be derived by analogy based on the teachings of the present invention. In addition, each of the described embodiments is not limited to being used alone, but can also be used in combination, for example, but not limited to, the two embodiments are used together. Accordingly, the scope of the present invention is intended to cover the above and all other equivalent changes. In addition, any implementation form of the present invention may not necessarily achieve all the objects or advantages, and therefore, any of the claims shall not be limited thereto.
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