Patent ID: 8766235
Filing Date: 2014-07-01
Classification: H01L

Abstract:
1. An array of bipolar junction transistors, comprising: a stack of implant regions within a semiconductor material; the stack comprising a base implant region between a pair of emitter/collector implant regions; one of the emitter/collector implant regions being a top emitter/collector region and the other of the emitter/collector implant regions being a bottom emitter/collector region; the emitter/collector implant regions being a first type and the base implant region being a second type, with one of the first and second types being p-type and the other being n-type; the base implant region, together with the emitter/collector implant regions, comprising the bipolar junction transistors; first trenches extending along a first direction within the stack; and second trenches extending along a second direction within the stack; the first trenches penetrating only partially through the base implant region, and the second trenches penetrating entirely through the base implant region but only partially through the bottom emitter/collector region; the second direction intersecting the first direction; and electrically insulative material within the first and second trenches; wherein at least some of the electrically insulative material within the first and second trenches comprises at least about 7×10