Patent ID: 7977729
Filing Date: 2011-07-12
Classification: G04F,G11C,H01L

Abstract:
1. An aging device comprising: a semiconductor substrate; an element isolation insulating layer provided in a surface region of the semiconductor substrate; a first element region with a width in a first direction, which is surrounded by the element isolation insulating layer; a second element region which is provided beside the first element region, wherein the second element region is surrounded by the element isolation insulating layer; first and second diffusion layers arranged in a second direction orthogonal to the first direction side by side in the first element region; a channel region provided between the first and second diffusion layers; a floating gate which is provided above the channel region and which extends in the first direction, wherein the floating gate is provided above the element isolation insulating layer between the first and second element regions; and a control gate electrode provided beside the floating gate with an interval in the first direction, wherein the control gate electrode is provided above the second element region, wherein a width in the second direction of the floating gate is wider in an area adjacent to the control gate electrode than an area above the first element region, and a coupling capacitance between the floating gate and the control gate electrode is larger than a coupling capacitance between the floating gate and the semiconductor substrate.