CN105551956A - 用于半导体背面通孔金属化种子层的化学镀钯方法 - Google Patents
用于半导体背面通孔金属化种子层的化学镀钯方法 Download PDFInfo
- Publication number
- CN105551956A CN105551956A CN201511017548.8A CN201511017548A CN105551956A CN 105551956 A CN105551956 A CN 105551956A CN 201511017548 A CN201511017548 A CN 201511017548A CN 105551956 A CN105551956 A CN 105551956A
- Authority
- CN
- China
- Prior art keywords
- palladium
- chemical
- plating
- seed layer
- semiconductor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 238000007747 plating Methods 0.000 title claims abstract description 60
- 239000004065 semiconductor Substances 0.000 title claims abstract description 56
- 229910052763 palladium Inorganic materials 0.000 title claims abstract description 51
- 239000000126 substance Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000001465 metallisation Methods 0.000 title claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 50
- 239000002184 metal Substances 0.000 claims abstract description 50
- 239000013078 crystal Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000006479 redox reaction Methods 0.000 claims abstract description 4
- 239000002253 acid Substances 0.000 claims description 17
- 239000003513 alkali Substances 0.000 claims description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 11
- 239000010410 layer Substances 0.000 claims description 11
- 239000000758 substrate Substances 0.000 claims description 11
- 230000003213 activating effect Effects 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 9
- 229920002120 photoresistant polymer Polymers 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 6
- 229910001218 Gallium arsenide Inorganic materials 0.000 claims description 5
- 230000004913 activation Effects 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 4
- 239000008188 pellet Substances 0.000 claims description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 2
- 238000004544 sputter deposition Methods 0.000 abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 abstract description 4
- 230000002378 acidificating effect Effects 0.000 abstract 1
- -1 palladium ions Chemical class 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 235000012431 wafers Nutrition 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010923 batch production Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005234 chemical deposition Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- MUJIDPITZJWBSW-UHFFFAOYSA-N palladium(2+) Chemical compound [Pd+2] MUJIDPITZJWBSW-UHFFFAOYSA-N 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
Classifications
-
- 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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/32051—Deposition of metallic or metal-silicide layers
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/1851—Pretreatment of the material to be coated of surfaces of non-metallic or semiconducting in organic material
- C23C18/1872—Pretreatment of the material to be coated of surfaces of non-metallic or semiconducting in organic material by chemical pretreatment
- C23C18/1875—Pretreatment of the material to be coated of surfaces of non-metallic or semiconducting in organic material by chemical pretreatment only one step pretreatment
- C23C18/1879—Use of metal, e.g. activation, sensitisation with noble metals
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/42—Coating with noble metals
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/12—Semiconductors
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electrochemistry (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Electroplating Methods And Accessories (AREA)
- Electrodes Of Semiconductors (AREA)
Abstract
本发明公开了一种用于半导体背面通孔金属化种子层的化学镀钯方法,通过强酸环境中钯离子及还原剂与半导体材料和金属表面发生强氧化还原反应在半导体材料和金属表面置换出一层钯晶种,其后在钯化学镀液中通过镀液的自激发在钯晶种上持续沉淀钯金属,从而在半导体材料和金属表面获得一定厚度的钯金属层形成背面通孔金属化种子层。该方法与传统溅射金属种子层技术相比具有工艺简单、工艺质量好、成品率高、使用范围广、成本低等优点,具有良好的市场应用前景。
Description
技术领域
本发明属于半导体背面工艺技术领域,具体涉及一种用于半导体背面通孔金属化种子层的化学镀钯方法。
背景技术
背孔接地已经成为GaAsMMIC的标准工艺设计,它不仅降低了正面布线的压力,降低了电路损耗,还能为有源区散热提供帮助。目前世界主流GaAsMMIC工艺在背孔制备后,基本采用先溅射金属种子层后电镀金的金属化工艺模块设计,该技术经过多年的发展,已趋于成熟。溅射金属种子层技术是利用溅射台各项同性的金属化效果,将GaAs背面和通孔侧壁溅射上种子层金属。
但是在实际应用中,溅射金属的覆盖效果并不太理想,特别在深孔溅射方面,溅射金属覆盖性随背孔深度的增加而变差;此外在毛刺较多的孔壁上,金属层厚度很不均匀,被毛刺阻挡的区域金属常出现微断甚至断层,在后续的电镀过程中这些区域容易形成封泡或孔洞,电镀效果差,严重影响芯片质量以及可靠性。且采用溅射金属种子层技术靶材利用率低,工艺成本高。上述缺陷限制了溅射金属种子层技术的发展,使其难以得到进一步推广与应用。
化学镀技术是在无外加电源的作用下,利用同一溶液内的金属离子及还原剂,在具有催化活性的基体表面发生氧化还原反应,从而在基体表面化学沉积得到金属或合金镀层的一种表面处理技术。因为其不需要外加电源,操作方便、工艺简单、镀层均匀、孔隙率低和外观良好,在任何复杂表面均可获得均匀的镀层,使用范围广。
金属钯位于元素周期表的第五周期,具有优良的耐腐蚀性、低的接触电阻、可焊性、催化活性强、性能稳定等特性,价格相对低廉,镀液使用率高,工艺成本低。因此化学镀Pd技术用作背面通孔电镀种子与溅射金属金属种子层相比具有工艺质量好,成品率高、成本低等优势,越来越受业界人士的欢迎。
发明内容
发明目的:为解决现有技术中存在的技术问题,本发明提出一种工艺质量可靠、工艺操作简单、使用范围广、成品率高、成本低,适合批量生产的用于半导体背面通孔金属化种子层的化学镀钯方法。
技术手段:为实现上述技术目的,本发明提出了半导体背面通孔金属化种子层的化学镀钯方法,包括:
S1、备片:将半导体圆片与载体片键合后进行背面工艺步骤从而形成通孔,所述背面工艺依次包括减薄、抛光、背孔刻蚀及去胶;
S2、清洗:将步骤S1中得到的半导体圆片通过等离子体去胶、清洗,确保工艺前半导体圆片背面、孔底金属表面以及孔内半导体表面的干净;
S3、活化:将步骤S2得到的已清洗的半导体圆片浸泡钯活化液中活化,通过氧化还原反应在半导体材料和孔底金属表面置换出一层钯晶种;
S4、化学镀钯:将已活化的半导体圆片浸泡在钯化学镀液中进行化学镀,通过镀液的自激发在钯晶种上持续沉淀钯金属至目标厚度,完成电镀种子层的制作;
S5、背面通孔金属化:将已化学镀钯的半导体片进行背面电镀,利用孔底金属完成背面通孔金属化。
其中,所述化学镀钯使用的活化液为EEJA生产的MICROFABAC-2;所述化学镀钯使用的化学镀液为EEJA生产的MICROFABPD2000s。
优选地,所述半导体圆片的材料为砷化镓、硅、磷化铟中的任意一种;所述孔底金属为金、铂、钛、镍、银、铝、铜中的任意一种。
具体地,步骤S2中,等离子体去胶的条件为在氧气200~500sccm、氮气50~100sccm、功率200~400w的等离子体环境中去除残留胶膜去除残留胶膜;清洗的条件为通过酸碱清洗液去除半导体材料及金属表面氧化层。
优选地,所述酸液、碱液、双氧水溶液均为工业用EL级;所述酸液位质量分数36%~38%的浓盐酸、质量分数85%~87%的浓磷酸、质量分数96%~98%的浓硫酸、质量分数64%~66%浓硝酸的任意一种;所述碱液为质量分数26%浓氨水;所述双氧水质量分数26%~28%。
优选的半导体材料为砷化镓时,酸碱液优选氨水;半导体材料为硅时,酸碱液优选盐酸;半导体材料为磷化铟时,酸碱液优选磷酸。
优选地,所述酸碱清洗液的体积比为酸或碱液10%,双氧水5%,水85%;在上述酸碱清洗液中浸泡并超声清洗5min。
具体,所述步骤S3中活化的条件为:浸泡钯含量为30~50mg/L的强酸性活化液中反复提拉30-600s生长钯晶种,其中pH值为1.0~2.0、温度为20~30℃、溶液比重为1.1~1.7°Bé。
步骤S4中,所述化学镀的条件为:在所述钯化学镀液中反复提拉至钯沉淀到目标厚度,其中钯含量0.8~1.2g/L、pH值为7.3~7.9、温度为50~54℃、溶液比重为5.0~8.0°Bé、还原剂含量1.5~10g/L。
优选地,步骤S2、S3、S4中在处理时均需加入超声,超声频率100~200KHz。
有益效果:与现有技术相比,本发明的方法工艺简单、工艺质量好、成品率高、使用范围广、成本低,适合批量生产,具有广大的市场前景。
附图说明
附图是用来提供对本发明的进一步解释,并构成说明书的一部分,与下面的具体实施方式一起用于解释本发明,但并不构成对本发明的限制。在附图中:
图1为半导体圆片背孔刻蚀去胶后的背孔结构示意图;
图2为半导体圆片活化后的背孔结构示意图;
图3为半导体圆片化学镀后的背孔结构示意图;
图4为半导体圆片背面通孔金属化完成后的结构示意图;
如图所示:1、载体片;2半导体圆片;3、背面通孔;4、钯晶种层;5、钯金属化学镀层;6、背面电镀金属层。
具体实施方式
本发明提出了一种用于半导体背面通孔金属化种子层的化学镀钯方法,通过强酸环境中钯离子及还原剂与半导体材料和金属表面发生强氧化还原反应在半导体材料和金属表面置换出一层钯晶种,其后在钯化学镀液中通过镀液的自激发在钯晶种上持续沉淀钯金属,从而在半导体材料和金属表面获得一定厚度的钯金属层形成背面通孔金属化种子层,然后将已化学镀钯的半导体片进行背面电镀,利用孔底金属完成背面通孔金属化。其中,本实施例中使用的化学镀钯使用的活化液为日本ElectroplatingEngineersofJapanLTD公司生产的MICROFABAC-2;化学镀钯使用的化学镀液为日本ElectroplatingEngineersofJapanLTD生产的MICROFABPD2000s。
下面结合附图和具体实施方式对本发明做进一步详细的说明。
S1、将半导体圆片2(示例中为砷化镓,下同)与载体片1(示例中为蓝宝石,下同)键合后,依次通过减薄、抛光、背孔光刻、背孔刻蚀、刻蚀后去胶等背面工艺后形成通孔3,背孔尺寸与形状可根据工艺需求确定,如图1所示;
S2、将已做背面通孔的半导体圆片1在氧气500sccm,氮气100sccm,功率400w的等离子体环境中去除残留胶膜;
S3、将等离子体去胶后的圆片,浸泡在体积比为:氨水(质量浓度为26wt%~28wt%)10%、双氧水5%、水85%的清洗液中,150KHz频率超声5min,去除圆片表面及孔内金属的氧化层,露出干净的材料表面,后用去离子水冲洗5min,去除酸碱清洗液。
S4、将清洗后的圆片浸泡pH值为1.0~2.0、温度为20~30℃、钯含量为30~50mg/L、溶液比重为1.1~1.7°Bé的钯活化液中,150K频率超声5min,目的通过半导体材料和孔底金属与活化液中Pd离子发生强置换反应,在半导体材料和孔底金属表面均匀生成钯晶种层4。
S5、将活化后的圆片浸泡于钯含量0.8~1.2g/L、pH值为7.3~7.9、温度为50~54℃、溶液比重为5.0~8.0°Bé、沉淀速度0.01~1nm/s的钯化学镀液中,150K频率超声直至钯金属沉淀到200nm,目的在钯金属活化层4表面持续的自析出钯金属,形成钯金属化学镀层5。
S6、将化学镀后形成钯金属电镀种子层的圆片进行电镀金,完成背面通孔金属化。
经过以上步骤实现化学镀钯作为半导体背面通孔金属化种子层的制作,此方法不需要外加电源,操作方便、工艺简单、镀层均匀(均匀性低于5%)和外观良好;在复杂的材料表面也可获得均匀的镀层,适用范围更广;镀液使用率高、工艺成本低适合批量生产。
本发明未涉及部分均与现有技术相同或可采用现有技术加以实现。
Claims (8)
1.一种用于半导体背面通孔金属化种子层的化学镀钯方法,其特征在于:所示方法包括以下步骤:
S1、备片:将半导体圆片与载体片键合后进行背面工艺步骤从而形成通孔,所述背面工艺依次包括减薄、抛光、背孔刻蚀及去胶;
S2、清洗:将步骤S1中得到的半导体圆片通过等离子体去胶、清洗,确保工艺前半导体圆片背面、孔底金属表面以及孔内半导体表面的干净;
S3、活化:将步骤S2得到的已清洗的半导体圆片浸泡于钯活化液中活化,通过氧化还原反应在半导体材料和孔底金属表面置换出一层钯晶种;
S4、化学镀钯:将已活化的半导体圆片浸泡在钯化学镀液中进行化学镀,通过镀液的自激发在钯晶种上持续沉淀钯金属至目标厚度,完成电镀种子层的制作;
S5、背面通孔金属化:将已化学镀钯的半导体片进行背面电镀,利用孔底金属完成背面通孔金属化。
2.根据权利1所述的用于半导体背面通孔金属化种子层的化学镀钯方法,其特征在于,所述化学镀钯使用的活化液为日本ElectroplatingEngineersofJapanLTD公司生产的MICROFABAC-2;所述化学镀钯使用的化学镀液为日本ElectroplatingEngineersofJapanLTD生产的MICROFABPD2000s。
3.根据权利1所述的用于半导体背面通孔金属化种子层的化学镀钯方法,其特征在于,所述半导体圆片的材料为砷化镓、硅、磷化铟中的任意一种;所述孔底金属为金、铂、钛、镍、银、铝、铜中的任意一种。
4.根据权利1所述的用于半导体背面通孔金属化种子层的化学镀钯方法,其特征在于,步骤S2中,等离子体去胶的条件为在氧气200~500sccm、氮气50~100sccm、功率200~400w的等离子体环境中去除残留胶膜去除残留胶膜;清洗的条件为通过酸碱清洗液去除半导体材料及金属表面氧化层。
5.根据权利4所述的用于半导体背面通孔金属化种子层的化学镀钯方法,其特征在于所述酸碱清洗液的体积比为酸液或碱液5%~30%、双氧水1%~30%、水40%~94%;清洗过程为在上述酸碱清洗液中浸泡并超声清洗0.5~20min,其中,所述酸液为36wt%~38wt%的浓盐酸、85wt%~87wt%的浓磷酸、96wt%~98wt%的浓硫酸、64wt%~66wt%浓硝酸的任意一种;所述碱液为26wt%浓氨水;所述双氧水26wt%~28wt%。
6.根据权利1所述的用于半导体背面通孔金属化种子层的化学镀钯方法,其特征在于,所述步骤S3中活化的条件为:浸泡于钯活化液中反复提拉30~600s生长钯晶种,其中,所述钯活化液的钯含量为30~50mg/L,pH值为1.0~2.0,溶液比重为1.1~1.7°Bé,活化温度为20~30℃。
7.根据权利1所述的用于半导体背面通孔金属化种子层的化学镀钯方法,其特征在于,步骤S4中,所述化学镀的条件为:在所述钯化学镀液中反复提拉至钯沉淀到目标厚度,其中,所述钯化学镀液的钯含量0.8~1.2g/L、pH值为7.3~7.9、温度为50~54℃、溶液比重为5.0~8.0°Bé。
8.根据权利1所述的用于半导体背面通孔金属化种子层的化学镀钯方法,其特征在于,步骤S2、S3、S4中在处理时均需加入超声,超声频率40~950KHz。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201511017548.8A CN105551956A (zh) | 2015-12-29 | 2015-12-29 | 用于半导体背面通孔金属化种子层的化学镀钯方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201511017548.8A CN105551956A (zh) | 2015-12-29 | 2015-12-29 | 用于半导体背面通孔金属化种子层的化学镀钯方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN105551956A true CN105551956A (zh) | 2016-05-04 |
Family
ID=55831070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201511017548.8A Pending CN105551956A (zh) | 2015-12-29 | 2015-12-29 | 用于半导体背面通孔金属化种子层的化学镀钯方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN105551956A (zh) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106684061A (zh) * | 2016-12-14 | 2017-05-17 | 中国电子科技集团公司第五十五研究所 | 一种磷化铟背孔的制作方法 |
CN107236945A (zh) * | 2017-08-15 | 2017-10-10 | 合肥正明机械有限公司 | 一种不锈钢表面磷化膜的制备方法 |
CN105938793B (zh) * | 2016-06-27 | 2019-02-26 | 山东浪潮华光光电子股份有限公司 | 一种针对背镀晶片的清洗工艺 |
WO2020192528A1 (zh) * | 2019-03-28 | 2020-10-01 | 京东方科技集团股份有限公司 | 阵列基板的制作方法、阵列基板和显示装置 |
CN115011953A (zh) * | 2022-06-21 | 2022-09-06 | 深圳芯源新材料有限公司 | 一种复杂结构自适应的可焊接柔性金属垫片及其制备方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1900358A (zh) * | 2005-07-06 | 2007-01-24 | 应用材料公司 | 用于将金属无电镀沉积到半导体衬底上的装置 |
US20070236641A1 (en) * | 2006-04-06 | 2007-10-11 | Samsung Electronics Co., Ltd. | Thin film transistor substrate and method of fabricating the same |
TW201109470A (en) * | 2009-09-04 | 2011-03-16 | Win Semiconductors Corp | A method of using an electroless plating for depositing a metal seed layer on semiconductor chips for the backside and via-hole manufacturing processes |
CN103904022A (zh) * | 2012-12-25 | 2014-07-02 | 中国科学院金属研究所 | 一种基于化学镀镍合金的通孔填充方法及其应用 |
CN104178752A (zh) * | 2013-05-23 | 2014-12-03 | 中国科学院大连化学物理研究所 | 一种化学镀钯或其合金膜进行化学镀前的活化方法 |
-
2015
- 2015-12-29 CN CN201511017548.8A patent/CN105551956A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1900358A (zh) * | 2005-07-06 | 2007-01-24 | 应用材料公司 | 用于将金属无电镀沉积到半导体衬底上的装置 |
US20070236641A1 (en) * | 2006-04-06 | 2007-10-11 | Samsung Electronics Co., Ltd. | Thin film transistor substrate and method of fabricating the same |
TW201109470A (en) * | 2009-09-04 | 2011-03-16 | Win Semiconductors Corp | A method of using an electroless plating for depositing a metal seed layer on semiconductor chips for the backside and via-hole manufacturing processes |
CN103904022A (zh) * | 2012-12-25 | 2014-07-02 | 中国科学院金属研究所 | 一种基于化学镀镍合金的通孔填充方法及其应用 |
CN104178752A (zh) * | 2013-05-23 | 2014-12-03 | 中国科学院大连化学物理研究所 | 一种化学镀钯或其合金膜进行化学镀前的活化方法 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105938793B (zh) * | 2016-06-27 | 2019-02-26 | 山东浪潮华光光电子股份有限公司 | 一种针对背镀晶片的清洗工艺 |
CN106684061A (zh) * | 2016-12-14 | 2017-05-17 | 中国电子科技集团公司第五十五研究所 | 一种磷化铟背孔的制作方法 |
CN107236945A (zh) * | 2017-08-15 | 2017-10-10 | 合肥正明机械有限公司 | 一种不锈钢表面磷化膜的制备方法 |
WO2020192528A1 (zh) * | 2019-03-28 | 2020-10-01 | 京东方科技集团股份有限公司 | 阵列基板的制作方法、阵列基板和显示装置 |
US11482545B2 (en) | 2019-03-28 | 2022-10-25 | Beijing Boe Display Technology Co., Ltd. | Method of forming array substrate, array substrate and display device |
CN115011953A (zh) * | 2022-06-21 | 2022-09-06 | 深圳芯源新材料有限公司 | 一种复杂结构自适应的可焊接柔性金属垫片及其制备方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN105551956A (zh) | 用于半导体背面通孔金属化种子层的化学镀钯方法 | |
US8143164B2 (en) | Formation of a zinc passivation layer on titanium or titanium alloys used in semiconductor processing | |
TW201430901A (zh) | 在貴金屬電極上製造可線接合及可焊接之表面的方法 | |
CN107431001A (zh) | 半导体元件及其制造方法 | |
US20200260591A1 (en) | Method for forming metallization structure | |
US9331040B2 (en) | Manufacture of coated copper pillars | |
CN102560579A (zh) | 一种硅铝合金电镀镍的方法 | |
CN102560496B (zh) | 种子层的蚀刻方法 | |
JP3959044B2 (ja) | アルミニウムおよびアルミニウム合金のめっき前処理方法 | |
TW201722880A (zh) | 附膜玻璃板之製造方法 | |
CN110565093A (zh) | 一种钼铜复合材料镀覆方法 | |
CN102569506B (zh) | 一种采用硅烷掩膜制备太阳能电池金属电极的方法 | |
WO2023028015A1 (en) | Electrochemical depositions of nanotwin copper materials | |
CN105051254A (zh) | 供无电电镀的铜表面活化的方法 | |
CN104979276B (zh) | 一种半导体器件的制造方法 | |
CN105439469A (zh) | 一种石英玻璃表面化学镀镍铜合金的方法 | |
JP6270681B2 (ja) | 配線構造体の製造方法、銅置換めっき液および配線構造体 | |
US7147896B2 (en) | Electroless nickel plating method for the preparation of zirconia ceramic | |
KR101179118B1 (ko) | 질화알루미늄-h질화붕소 복합체를 기판으로 하는 열판 및 그 제조방법 | |
KR20150009400A (ko) | 무전해 구리도금액을 이용한 구리 도금층 형성방법 | |
TW201432089A (zh) | 以金屬鍍覆基材的方法 | |
TW201222653A (en) | Method of forming micro-pore structure or recess structure on silicon chip substrate surface | |
CN115968245A (zh) | 一种基于锚固效应提高n型碲化铋基热电元件金属化连接强度的方法 | |
KR102670882B1 (ko) | 배선 구조체의 제조 방법, 구리 치환 도금액 및 배선 구조체 | |
CN115188678A (zh) | 一种微波集成电路导电互联的制造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160504 |