Semiconductor compound electrode material containing calcium and a noble metal
US6104044A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1997 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | May 23, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/32341
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is an electrode material for Group III-V compound semiconductor represented by the general formula In.sub.x Ga.sub.y Al.sub.z N (provided that x+y+z=1, 0.ltoreq.x.ltoreq.1, 0.ltoreq.y.ltoreq.1, and 0.ltoreq.z.ltoreq.1) doped with a p-type impurity which is capable of obtaining good ohmic contact, and an electrode using the same, thereby making it possible to reduce a driving voltage of a device using the compound semiconductor. The electrode material is a metal comprising at least Ca and a noble metal, wherein the total amount of the weight of Ca and the noble metal is not less than 50% by weight and not more than 100% by weight based on the weight of the whole electrode material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.