SEMICONDUCTOR DEVICE, SECONDARY BATTERY PROTECTING DEVICE, AND METHOD OF MANUFACTURING SEMICONDUCTOR DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a semiconductor device and a charge/discharge control device with improved characteristics, and to provide a method of manufacturing a semiconductor device at low cost and with improved productivity. SOLUTION: The semiconductor device includes two MOSFETs formed on both sidewalls of a trench 3. The layout pitch of first p-base pickup regions 41 of one MOSFET is set wider than the layout pitch of second p-base pickup regions 51 of the other MOSFET. A resist mask 63 at the time of forming the first p-base pickup regions 41 and the second p-base pickup regions 51 is formed to cover a first p-base region 4 and a second p-base region, both being adjacent to the trench 3, and then ions of an impurity are injected. COPYRIGHT: (C)2011,JPO&INPIT