Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 5571747 | Method for producing a semiconductor commutator A semiconductor commutator which is constructed by joining a semiconductor region of the first conductivity type and a semiconductor region of the second conductivity type, wherein there is provided a grain boundary which is located near a junction surfac... | 11/05/1996 |
| 5569611 | Method of manufacturing a bipolar transistor operating at low temperature In a method of manufacturing a bipolar transistor, an oxide film pattern is formed on an epitaxial collector layer of a first conductive type which is formed on a buried layer of the first conductive type. A selectively-ion-implanted-collector (SIC) regio... | 10/29/1996 |
| 4843034 | Fabrication of interlayer conductive paths in integrated circuits A method of producing interlayer conductive paths having substantially planar top surfaces in a multilayer integrated circuit structure, comprising the steps of forming elements of either a conductive or semiconductive material as a lower layer, depositin... | 06/27/1989 |
| 4168997 | Method for making integrated circuit transistors with isolation and substrate connected collectors utilizing simultaneous outdiffusion to convert an epitaxial layer In an integrated circuit structure a subsurface isolation layer is doped by diffusion during wafer processing. A substrate is first doped by ion implantation to create surface layer of the opposite conductivity type. Where substrate connections are to be ... | 09/25/1979 |
| 4140559 | Method of fabricating an improved substrate fed logic utilizing graded epitaxial deposition An integrated circuit having a substrate of a first conductivity type, a first layer of opposite conductivity type thereon and a second layer of said first conductivity type inversely graded on said first layer and including a heavily doped region adjacen... | 02/20/1979 |
