SLS complementary logic devices with increase carrier mobility

Details SLS complementary logic devices with increase carrier mobility SLS complementary logic devices with increase carrier mobility

1990-10-26

1991-07-09

James, Andrew J.

357 4, 357 16, 357 42, 357 44, H01L 2980

Patent

active

050310070

ABSTRACT:
In an electronic device comprising a semiconductor material and having at least one performance characteristic which is limited by the mobility of holes in the semiconductor material, said mobility being limited because of a valence band degeneracy among high-mobility and low-mobility energy levels accessible to said holes at the energy-momentum space maximum, an improvement is provided wherein the semiconductor material is a strained layer superlattice (SLS) whose layer compositions and layer thicknesses are selected so that the strain on the layers predominantly containing said at least one carrier type splits said degeneracy and modifies said energy levels around said energy-momentum space maximum in a manner whereby said limitation on the mobility of said holes is alleviated.

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