ELECTRO-STATIC DISCHARGE CIRCUITS AND METHOD FOR MANUFACTURING THE SAME

摘要

PURPOSE: An ESD(Electro-Static Discharge) protection circuit and a manufacturing method thereof are provided to delay a base width widening phenomenon due to a Kirk effect by expanding a drift region in contact with a drain region. CONSTITUTION: A first conductive well(20) is formed on a semiconductor substrate. A second conductive well(30) is separated from the first conductive well on the semiconductor substrate. A first drift region(40) is formed on the first conductive well. A second drift region(50) is formed on the second conductive region and the first conductive well. A second conductive source region is formed on the first drift region. A second conductive drain region is separated from the end of the first conductive well on the second drift region. A gate electrode is formed on the semiconductor substrate between the second conductive source region and the second drift region.