Number | Name | Date | Kind |
---|---|---|---|
3657030 | Porter | Apr 1972 | |
3738880 | Laker | Jun 1973 | |
3784424 | Chang | Jan 1974 | |
3811975 | Lierop et al. | May 1974 |
Entry |
---|
IBM Technical Disclosure Bulletin, vol. 14, No. 11, Apr. 1972, Contact Hole Etching for P-Channel Silicon Gate FETS by C. A. Barile, p. 3331. |