公开(公告)号：DE69105793D1

公开(公告)日：1995-01-26

申请号：DE69105793

申请日：1991-02-06

Applicant: IBM

Inventor： HUANG WU-SONG ,  KHANDROS IGOR YAN ,  SARAF RAVI ,  SHI LEATHEN

IPC: B23K35/22 ,  B23K35/26 ,  B23K35/36 ,  B23K35/363 ,  B23K101/36 ,  C08K3/08 ,  H05K3/32 ,  H05K3/34

Abstract: An improved solder/polymer fluxless composite paste interconnection material having a low reflow temperature to form electrical contacts having good bonding strength and low contact resistance. The present pastes comprise a major proportion of a meltable metal alloy powder filler, free of noble metals and preferably free of lead, a minor proportion of a solution of a temperature-stable thermoplastic polymer having a softening temperature above the melting temperature of the metal powder filler in a volatile solvent which evaporates during reflow, and a minor proportion of a fluxing agent having a boiling point lower than the reflow temperature of the composition and higher than the melting point of the eutectic alloy powder filler. An oxide-free, partially coalesced metal alloy connection is obtained, which is polymer strengthened and reworkable at a low reflow temperature, per se, or in the presence of polymer solvent.

公开(公告)号：DE69105793T2

公开(公告)日：1995-06-29

申请号：DE69105793

申请日：1991-02-06

Applicant: IBM

Inventor： HUANG WU-SONG ,  KHANDROS IGOR YAN ,  SARAF RAVI ,  SHI LEATHEN

IPC: B23K35/22 ,  B23K35/26 ,  B23K35/36 ,  B23K35/363 ,  B23K101/36 ,  C08K3/08 ,  H05K3/32 ,  H05K3/34

Abstract: An improved solder/polymer fluxless composite paste interconnection material having a low reflow temperature to form electrical contacts having good bonding strength and low contact resistance. The present pastes comprise a major proportion of a meltable metal alloy powder filler, free of noble metals and preferably free of lead, a minor proportion of a solution of a temperature-stable thermoplastic polymer having a softening temperature above the melting temperature of the metal powder filler in a volatile solvent which evaporates during reflow, and a minor proportion of a fluxing agent having a boiling point lower than the reflow temperature of the composition and higher than the melting point of the eutectic alloy powder filler. An oxide-free, partially coalesced metal alloy connection is obtained, which is polymer strengthened and reworkable at a low reflow temperature, per se, or in the presence of polymer solvent.

公开(公告)号：AU5561696A

公开(公告)日：1997-11-07

申请号：AU5561696

申请日：1996-04-19

Applicant: IBM

Inventor： DAREKAR VIJAY ,  BRUSIC VLASTA ,  SARAF RAVI ,  GAYNES MICHAEL

IPC: B05D3/02 ,  B05D7/16 ,  B23K35/00 ,  B23K35/02 ,  B23K35/34 ,  B23K35/36 ,  C23C22/02 ,  C23C22/68 ,  C23C30/00 ,  C23F11/14 ,  H05K3/10 ,  H05K3/24 ,  H05K3/28 ,  H05K3/34

Abstract: Copper-containing surfaces of substrates such as laminated electronic circuit boards are protected by organometallic coatings comprising organic compounds selected from the group consisting of benzimidazoles, alkylimidazoles, benzotriazozles and alkyltriazoles, substituted or unsubstituted, and metal particles of solder-wettable metals or metal solders. The metal particles can be thermally formed in situ from metallic compounds such as noble metal acetates, acetylacetonates and carbonates.