Higher voltage drain extended MOS transistors with self-aligned channel and drain extensions

摘要

An integrated circuit drain extension transistor. A transistor gate (72) is formed over a CMOS n-well region (10). A transistor source extension region (50), and drain extension region (52) are formed in the CMOS well region (10). A transistor region (90) is formed in the source extension region 50 and a transistor drain region 92 is formed between two drain alignment structures (74), (76) in the drain extension region (52).