Patent ID: 6182358
Filing Date: 2001-02-06
Classification: H01L,H05K,Y10T

Abstract:
A process for producing a ceramic-metal-substrate having a ceramic layer (2) with two metal layers (3, 4), one each disposed on each surface side of said ceramic layer which forms at least one edge (5', 14) over which one of said two metal layers projects with a sub-area, with said one of said two metal layers being a metal foil attached to said ceramic layer (2) and with said at least one edge being formed by an opening through said ceramic layer (2) and the other of said two metal layers, comprising the steps of:forming an initial substrate (1, 1a, 1b) by applying said two metal layers (3, 4) on said ceramic layer (2);clamping said initial substrate (1, 1a, 1b) between a first pair of tool parts (10, 11; 18, 19) of a deformation tool at least in an area of said edge of said ceramic layer such that one of said first pair of tool parts (10, 18) rests against a surface side of said one of said two metal layers (3) facing away from said at least one ceramic layer (2), by a distance from said edge (5, 14), said distance corresponding to a width of a border area (7) along said edge;deforming permanently said one metal layer by a tool acting on said sub-area such that in said border area (7) of predetermined width along said edge, said one of said two metal layers (3) is bent away from said ceramic layer (2) and disposed a distance from said one surface side of said ceramic layer (2) and is raised over said one surface side of said ceramic layer, in said border area (7) of predetermined width along said edge.