Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1983-07-29
1985-09-10
Lesmes, George F.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428701, 428702, 427 96, 501118, H05K 330, H05K 300
Patent
active
045406219
ABSTRACT:
A method for forming a substrate for electronic applications having a dielectric constant of less than 6 is disclosed. The method comprises admixing crystalline cordierite particles having a size of 0.1--10 microns with a binder and solvent, casting the same into a sheet, drying the cast sheet into a self-supporting green sheet and then heating the green sheet to burn out the binder and to sinter the particles together. A metallization pattern is deposited on the green sheet after the casting but before the heating, the metallization pattern being molybdenum or tungsten. The cordierite has a defined coefficient of thermal expansion. A dielectric substrate for mounting of integrated circuit devices thereon is also disclosed.
REFERENCES:
patent: 2731355 (1956-01-01), Skinner
patent: 3816172 (1974-06-01), Hoffman
patent: 4109377 (1978-08-01), Blazick et al.
patent: 4225354 (1980-09-01), Rao
patent: 4385129 (1983-05-01), Inoguchi et al.
patent: 4403017 (1983-09-01), Bind
Eggerding Carl L.
Giess Edward A.
Lesmes George F.
Swisher Nancy A. B.
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