Brazing material
First Claim
1. An assembly for brazing a silicon semiconductor body and a metal component, said assembly including brazing material comprising a layer of titanium, a layer of silver formed adjacent said layer of titanium and a layer comprising an aluminum-silicon composite.
9 Assignments
0 Petitions
Accused Products
Abstract
A mechanical and electrical bond between a silicon semiconductor wafer and a molybdenum contact is created by a multi-layer brazing material. The material includes adjacent layers of titanium and silver along with a layer which is either composed of aluminum or an aluminum-silicon composite. The material is heated to a temperature above its melting point. The aluminum reacts first with the silver, thereby dissolving less of the silicon. This reduces spiking and lowers the contact resistance.
4 Citations
20 Claims
- 1. An assembly for brazing a silicon semiconductor body and a metal component, said assembly including brazing material comprising a layer of titanium, a layer of silver formed adjacent said layer of titanium and a layer comprising an aluminum-silicon composite.
-
7. An assembly for brazing a silicon semiconductor body and a metal component, said assembly including brazing material comprising a layer of titanium, a layer of silver formed adjacent said layer of titanium and a third layer comprising aluminum, said third layer being interposed between said layers of titanium and silver and the surface of the metal component.
-
8. An assembly for brazing a silicon semiconductor body and a metal component, said assembly including brazing material comprising a layer of titanium, a layer of silver formed adjacent said layer of titanium and a third layer comprising aluminum, said layer of titanium having a thickness of approximately 500 angstroms.
-
9. An assembly for brazing a silicon semiconductor body and a metal component, said assembly including brazing material comprising a layer of titanium, a layer of silver formed adjacent said layer of titanium and a third layer comprising aluminum having a thickness in the range of 30,000-60,000 angstroms.
-
10. A method for forming a mechanical and electrical bond between the surface of a silicon semiconductor body and a metal component, the method comprising the steps of:
- forming a layer of titanium, forming a layer of silver adjacent the layer of titaniumm forming a layer composed of an aluminum-silicon composite and thereafter heating the assembly to a temperature above the melting point of the formed layers.
- View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
11. A method for forming a mechanical and electrical bond between the surface of a silicon semiconductor body and a metal component, the method comprising the steps of:
- depositing a multi-layer of brazing material between the semiconductor surface and the metal component and heating the metal to a temperature above its melting point, the material being deposited by forming a layer of titanium, forming a layer of silver adjacent the layer of titanium and forming a third layer comprising aluminum, said third layer being formed between the layers of titanium and silver and the surface of the component.
-
12. A method for forming a mechanical and electrical bond between the surface of a silicon semiconductor body and a metal component, the method comprising the steps of:
- forming a layer of titanium of a thickness of approximately 500 angstroms, forming a layer of silver adjacent the layer of titanium and forming a third layer composed of aluminum.
-
13. A method for forming a mechanical and electrical bond between the surface of the silicon semiductor body and a metal component, the method comprising the steps of:
- forming a layer of titanium, forming a layer of silver adjacent the layer of titanium and forming a third layer composed of aluminum having a thickness in the range of 30,000 to 60,000 angstroms.
Specification