Process for producing a metal-ceramic substrate
OwnerJurgen Schulz-Harderinventor
Life of this patent
Estimating the term…
Abstract
A process is provided in which an initial substrate has a ceramic layer with metal layers on either side. At least one of the metal layers projects above one edge of the ceramic layer. The projecting sub-area is deformed so that the metal layer on the edge is disposed a distance from the surface of the ceramic layer, and along the edge in one border area with a stipulated width is separated from the ceramic layer.
Claims16
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.
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), comprising the steps of:
- forming an initial substrate (1) by applying said two metal layers (3, 4) on said ceramic layer (2);
- clamping said initial substrate (1) between a first pair of tool parts (10, 11) of a stamping tool at least in an area of said edge of said ceramic layer (2) such, that one of said first pair of tool parts (10) is a female die with an opening (12) and rests against a surface side of said one metal layer (3) facing away from said 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;
- after clamping the initial substrate (1) deforming said sub-area (3′) by pressing said sub-area (3′) into said opening of said female die (10) by means of a male die (13) such that said one metal layer (3) is bent out of contact with 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;
- and
- with said edge formed by an interruption through the ceramic layer (2) and one of said two metal layers.
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, wherein one of said two metal layers (3) is formed by a metal foil attached to one surface side of said ceramic layer (2), comprising the steps of:
- producing an initial substrate comprising said ceramic layer (2) having an opening extending through said ceramic layer (5), said two metal layers applied to surface sides of said ceramic layer (2), with said one metal layer (3) bridging said opening with a sub area and with a second of said two metal layers having an opening extending through said metal layer of said at least one, and
- deforming permanently said at least subarea (3′) of said one metal layer (3) by a tool acting on said subarea (3) such that said subarea (3′) forms, after deformation, a bridge being concave on a side facing said ceramic layer, and that said one metal layer (3) on said edge (5′) is bent out of contact with said ceramic layer (2) and is disposed a distance from said one surface side of said ceramic layer (2) and is raised over said surface side over a border area (7) of predetermined width along the edge (5′) of said ceramic layer (2).
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 (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 one surface side of said ceramic layer (2) and with said edge (14) being the border of the ceramic layer (2), comprising the steps of:
- forming an initial substrate (1a) by applying said two metal layers (3, 4) on said ceramic layer (2);
- clamping said initial substrate (1a)between a first pair of tool parts (18, 19) of a bending tool at least in an area of said edge of said ceramic layer such that one of said pair of tool parts (18) rests against a surface side of said one metal layer (3) facing away from said ceramic layer (2), by a distance from said edge (14), said distance corresponding to a width of a border area (14) along said edge, said bending tool having at least two pairs of tool parts (18, 19, 20, 21), wherein said first pair of said at least two pairs of tool parts form a blank holder (18) and a pressure pad (19);
- clamping said sub-area projecting over said edge with a second pair of said at least two pairs of tool parts;
- deforming permanently said one metal layer by moving at least one of said at least two pairs of tool parts relative to another of said at least two pairs of tool parts such that in said border area (16) of predetermined width along said edge, said one metal layer (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 (16) of predetermined width along said edge.
Dependencies are inferred from the claim text.