Patent ID: 7048993
Filing Date: 2006-05-23
Classification: C03B,C03C,H01L,H05K,Y10T

Abstract:
1. A distortion-free asymmetrical low-temperature co-fired ceramic structure comprising at least one layer of glass-containing internal constraining tape and at least one layer of glass-containing primary tape wherein the internal constraining tape and the primary tape are laminated to form an asymmetrical laminate and wherein a release layer is deposited on at least one surface of the laminate forming an assembly, wherein the surface is opposite the position of greatest asymmetry of the laminated layers, wherein the assembly is thermally processed and the glass of the constraining tape initiates sintering before the glass of the primary tape producing the structure exhibiting an interactive suppression of x,y shrinkage wherein the glass in the primary tape exhibits a dimensional change measure in Thermal Mechanical Analysis of about 700° C. or higher, and wherein the glass in the constraining tape exhibits a dimensional change measured in Thermal Mechanical Analysis of at least 75° C. lower than the primary tape.