Patent ID: 9209030
Filing Date: 2015-12-08
Classification: H01L

Abstract:
1. A nonvolatile memory comprising: a source electrode formed in a semiconductor region; a drain electrode formed in the semiconductor region to be apart from the source electrode; a first gate insulating film formed on the semiconductor region between the source electrode and the drain electrode; a first floating gate formed on the first gate insulating film; a second gate insulating film formed on the first floating gate; a gate electrode formed on the second gate insulating film; a second floating gate formed on a first side surface of the first floating gate; a first insulating film which is formed between the first floating gate and the second floating gate and has an air gap; a third floating gate formed on a second side surface of the first floating gate on an opposite side from the first side surface; and a second insulating film formed between the first floating gate and the third floating gate.