Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1998-01-08
2000-03-14
Speer, Timothy M.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428469, 428472, 428702, 428901, 174255, 361791, 361795, B32B 300, H05K 103
Patent
active
060370440
ABSTRACT:
A high performance TF-ceramic module for mounting integrated circuit chips thereto and a method of fabricating the module at reduced cost. The substrate includes thin film (TF) layers formed directly on a layered ceramic base. A first thick film wiring layer is formed on or embedded in a top surface of the thick film layered ceramic base using thick film techniques. A first dielectric layer of a polyimide or other organic material, or an insulating material different than the ceramic material is formed on top of the first wiring layer. The dielectric layer may be spun on or sprayed on and baked; vapor deposited; laminated to the ceramic base; or an inorganic layer may be deposited using plasma enhanced chemical vapor deposition (PECVD). Vias are formed through the first dielectric layer. A second wiring layer is formed on the first dielectric layer. A second dielectric layer is formed on the second wiring layer. At least one mounting location suitable for mounting an electronic component is formed on the second dielectric layer. The substrate may be attached a printed circuit board by direct attachment, pin grid array (PGA), land grid array (LGA), ball arid array (BGA), column grid array (CGA) and miniBGA on the bottom layer of the ceramic base.
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Giri Ajay P.
Kamath Sundar M.
O'Connor Daniel P.
Patel Rajesh B.
Stoller Herbert I.
International Business Machines - Corporation
Speer Timothy M.
Townsend Tiffany L.
Young Bryant
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