Description: 438 semiconductor device manufacturing: process / 438 semiconductor device manufacturing: process/(142) making field effect device having pair of active regions separated by gate structure by formation or alteration of semiconductive active regions (197) having insulated gate (e.g., igfet, misfet, mosfet, etc.) (199) complementary insulated gate field effect transistors (i.e., cmos) (200) and additional electrical device (202) including bipolar transistor (i.e., bicmos) (205) plural bipolar transistors of differing electrical characteristics
Hierarchy/Derived subclasses
uspto searches
Patent Apps in 438/205
Granted Patents in 438/205
Use the links above or do an advanced search in
ppubs for:
(438/205.ccls.)
This will show what classes derive from the input. Ex: entering 43/42.24 shows the derived classes and the search that can be used to find
patents or patent applications in those subclasses.