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4593457 | Birrittella | Jun 1986 | |
4954457 | Jambotkar | Sep 1990 | |
5093272 | Hoepfner et al. | Mar 1992 |
Number | Date | Country |
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0138774 | Jun 1988 | JPX |
0030269 | Feb 1989 | JPX |
0090626 | Mar 1990 | JPX |
Entry |
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Masanori Inada et al, "AlGaAs/GaAs Heterojunction Bipolar Transistors with Small Size Fabricated by a Multiple Self-Alignment Process Using One Mask" IEEE Transactions on Electron Devices, vol. ED-34, No. 12, Dec. 1987, pp. 2405-2411. |