Number | Name | Date | Kind |
---|---|---|---|
4855244 | Hutter et al. | Aug 1989 | |
4912054 | Tomassetti | Mar 1990 | |
4929570 | Howell | May 1990 | |
5001073 | Huie | Mar 1991 | |
5006476 | De Jong et al. | Apr 1991 | |
5106765 | Mizutani et al. | Apr 1992 |
Number | Date | Country |
---|---|---|
0439899 | Aug 1991 | EPX |
Entry |
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D. de Lang et al, "Integration of Vertical PNP Transistors in a Double-Polysilicon Bi-CMOS Process", Bipolar Circuits and Technology Meeting, IEEE, 1989. |