Patent Number: 6,297,559

Title: Structure, materials, and applications of ball grid array interconnections

Abstract: A new interconnection scheme of a ball grid array (BGA) module is disclosed where a solder ball is connected to the BGA module by use of an electrically conducting adhesive The electrically conducting adhesive can be a mixture comprising a polymer resin, no-clean solder flux, a plurality of electrically conducting particles with an electrically conducting fusible coating and others. The solder balls in a BGA module can also be connected to a printed circuit board by use of another electrically conductive adhesive which can be joined at a lower temperature than the first joining to the BGA module. Additionally, an electrically conducting adhesive can be formed into electrically conducting adhesive bumps which interconnect an integrated circuit device to the BGA module.

Inventors: Call; Anson J. (Poughkeepsie, NY), DeLaurentis; Stephen Anthony (Claverack, NY), Farooq; Shaji (Hopewell Junction, NY), Kang; Sung Kwon (Chappaqua, NY), Purushothaman; Sampath (Yorktown Heights, NY), Stalter; Kathleen Ann (Hopewell Junction, NY)

Assignee: International Business Machines Corporation

International Classification: H01L 21/02 (20060101); H01L 21/48 (20060101); H01L 23/498 (20060101); H01L 23/48 (20060101); H05K 3/32 (20060101); H05K 3/34 (20060101); H01L 023/48 ()

Expiration Date: 10/02/2018