Liquid-phase epitaxial growth of cdTe on HgCdTe
US4357620A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1980 |
| Grant date | Nov 2, 1982 |
| Priority date | — |
| Expiry date | Nov 18, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/543
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method of growing a layer of CdTe on HgCdTe by liquid phase pitaxy. The solution for growth comprises Sn and Hg with a small amount of CdTe. A typical composition is Sn:Hg:CdTe=36:5:0.15 parts by weight. The growth temperature is a function of the amount of CdTe in solution. For the typical composition stated, the growth temperature is about 520.degree. C. The layers were grown on (111)A oriented CdTe substrates. The HgCdTe epilayer with a desired Cd composition is first grown, and an epilayer of CdTe is subsequently grown on the HgCdTe epilayer. The cross-diffusion at the CdTe/Hg.sub.1-x Cd.sub.x Te interface has been as small as 0.3 .mu.m for the thin CdTe epilayer. The first CdTe/HgCdTe heterojunction sensitive to .about.2.8 .mu.m at 77.degree. K. has been demonstrated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.