Title:
【発明の名称】パワーMOSFETトランジスタ回路
Document Type and Number:
Japanese Patent JP3041043
Kind Code:
B2
Abstract:
The present invention relates to a power MOS transistor having a current limiting circuit incorporated in the same substrate as the transistor. The power MOS transistor includes a drain region extending through the substrate between opposed first and second surfaces, a plurality of body regions in the substrate at the first surface, a separate source region in the substrate at the first surface within each body region and a channel extending across each body region between its junction with its respective source region and its junction with the drain region. A conductive gate is over and insulated from the first surface and extends over the channel regions. A first conductive electrode extends over and is insulated from the gate and contacts a first portion of the source regions. A second conductive electrode extends over and is insulated from the gate and contacts a second portion of the source regions. The second portion contains a smaller number of the source regions than the first portion. The current limiting circuit includes a bipolar transistor formed in a well region in the substrate, a zener diode formed in a second well region in the substrate and two resistors formed over and insulated from the first surface. The current limiting circuit is connected between the second portion of the source regions and the gate so as to reduce the power through the circuit.
Inventors:
Whitley Carl Frank Jr.
Whitley Jr. Carl Frank
Nailson John Marning Savage
Jones Frederick Peter
Whitley Jr. Carl Frank
Nailson John Marning Savage
Jones Frederick Peter
Application Number:
JP50150491A
Publication Date:
May 15, 2000
Filing Date:
November 20, 1990
Export Citation:
Assignee:
Harris Semiconductor Patents Incorporated
International Classes:
H01L29/78; H01L21/8234; H01L27/02; H01L27/04; H01L27/088; H03K17/08; (IPC1-7): H01L29/78; H01L21/8234; H01L27/088; H03K17/08
Domestic Patent References:
| JP6466970A | ||||
| JP63265470A | ||||
| JP62143450A | ||||
| JP366169A |
Foreign References:
| US4377945A |
Attorney, Agent or Firm:
Tadao Hirata (2 outside)