目前电子行业主要的键合线材有金线、纯铜线、镀钯铜线、银合金线等。金线由于成本太高已经不能适应市场发展需求;纯铜线容易氧化、加工难度高、可靠性低等因素只能占据低端产品市场;镀钯铜线材质太硬,在焊接过程中对产品铝垫损伤较大,...目前电子行业主要的键合线材有金线、纯铜线、镀钯铜线、银合金线等。金线由于成本太高已经不能适应市场发展需求;纯铜线容易氧化、加工难度高、可靠性低等因素只能占据低端产品市场;镀钯铜线材质太硬,在焊接过程中对产品铝垫损伤较大,容易产生裂纹和弹坑。银合金线材质比镀钯铜线软,加工稳定性高,所以被得到了较大的推广和使用。但是银合金线的主要成分为银,它是一种很活跃的带电离子,将会造成电性迁移现象;本论文通过两组试验论证,银合金线在特殊温度、电流密度、电场方向的影响下[1],它的中值失效时间(median time of failure简称MTF)会随着温度和电流密度的影响而变化,产生电性迁移,最终影响产品可靠性。展开更多
Conductive and adhesive hydrogels are promising materials for designing bioelectronics.To satisfy the high conductivity of bioelectronic devices,metal nanomaterials have been used to fabricate composite hydrogels.Howe...Conductive and adhesive hydrogels are promising materials for designing bioelectronics.To satisfy the high conductivity of bioelectronic devices,metal nanomaterials have been used to fabricate composite hydrogels.However,the fabrication of a conductive-nanomaterial-incorporated hydrogel with high performance is a great challenge because of the easy aggregation nature of conductive nanomaterials making processing difficult.Here,we report a kind of adhesive aero-hydrogel hybrid conductor(AAHC)with stretchable,adhesive and anti-bacteria properties by in situ formation of a hydrogel network in the aerogel-silver nanowires(AgNWs)assembly.The AgNWs with good conductivity are wellintegrated on the inner-surface of shape-memory chitosan aerogel,which created a conductive framework to allow hydrogel back-filling.Reinforcement by the aerogel-silver makes the hybrid hydrogel tough and stretchable.Functional groups from the hydrogel allow strong adhesion to wet tissues through molecular stitches.The inherent bacteria-killing ability of silver ions endows the conductive hydrogel with excellent anti-bacteria performance.The proposed facile strategy of aerogel-assisted assembly of metal nanomaterials with hydrogel opens a new route to incorporate functional nanoscale building blocks into hydrogels.展开更多
文摘目前电子行业主要的键合线材有金线、纯铜线、镀钯铜线、银合金线等。金线由于成本太高已经不能适应市场发展需求;纯铜线容易氧化、加工难度高、可靠性低等因素只能占据低端产品市场;镀钯铜线材质太硬,在焊接过程中对产品铝垫损伤较大,容易产生裂纹和弹坑。银合金线材质比镀钯铜线软,加工稳定性高,所以被得到了较大的推广和使用。但是银合金线的主要成分为银,它是一种很活跃的带电离子,将会造成电性迁移现象;本论文通过两组试验论证,银合金线在特殊温度、电流密度、电场方向的影响下[1],它的中值失效时间(median time of failure简称MTF)会随着温度和电流密度的影响而变化,产生电性迁移,最终影响产品可靠性。
基金the National Natural Science Foundation of China(51732011,51702310,21431006,and 21761132008)the Foundation for Innovative Research Groups of the National Natural Science Foundation of China(21521001)+2 种基金the Key Research Program of Frontier Sciences,CAS(QYZDJ-SSW-SLH036)the Users with Excellence and Scientific Research Grant of Hefei Science Center of CAS(2015HSC-UE007)Anhui Provincial Natural Science Foundation(1808085ME115)。
文摘Conductive and adhesive hydrogels are promising materials for designing bioelectronics.To satisfy the high conductivity of bioelectronic devices,metal nanomaterials have been used to fabricate composite hydrogels.However,the fabrication of a conductive-nanomaterial-incorporated hydrogel with high performance is a great challenge because of the easy aggregation nature of conductive nanomaterials making processing difficult.Here,we report a kind of adhesive aero-hydrogel hybrid conductor(AAHC)with stretchable,adhesive and anti-bacteria properties by in situ formation of a hydrogel network in the aerogel-silver nanowires(AgNWs)assembly.The AgNWs with good conductivity are wellintegrated on the inner-surface of shape-memory chitosan aerogel,which created a conductive framework to allow hydrogel back-filling.Reinforcement by the aerogel-silver makes the hybrid hydrogel tough and stretchable.Functional groups from the hydrogel allow strong adhesion to wet tissues through molecular stitches.The inherent bacteria-killing ability of silver ions endows the conductive hydrogel with excellent anti-bacteria performance.The proposed facile strategy of aerogel-assisted assembly of metal nanomaterials with hydrogel opens a new route to incorporate functional nanoscale building blocks into hydrogels.
