Semiconductor device and method of manufacturing the same

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H01L 29/78 (2006.01) H01L 21/28 (2006.01) H01L 21/338 (2006.01) H01L 29/12 (2006.01) H01L 29/417 (2006.01) H01L 29/812 (2006.01)

Patent

CA 2721668

An MOSFET (1) is a semiconductor device which can reduce the number of steps in manufacturing process and improve an integration degree by providing an electrode which can be in contact with both a p-type SiC region and an n-type SiC region while sufficiently suppressing contact resistance of the both regions. The MOSFET is provided with an n+ SiC substrate (11); an n- SiC layer (12) formed on the n+ SiC substrate (11); and a source electrode (22) arranged in contact with the n- SiC layer (12). The n- SiC layer (12) includes an n+ source region (14) of n- conductivity type. The source electrode (22) is arranged in con-tact with the n+ source region (14), and includes a source contact electrode (16) containing Ti, Al, and Si.

L'invention porte sur un transistor à effet de champ métal-oxyde-semi-conducteur (MOSFET) (1) qui est un dispositif à semi-conducteur qui peut réduire le nombre d'étapes du processus de fabrication et améliorer le degré d'intégration en utilisant une électrode qui peut être en contact à la fois avec une région SiC de type p et une région SiC de type n tout en supprimant suffisamment la résistance de contact des deux régions. Le MOSFET est pourvu d'un substrat SiCn+ (11) ; d'une couche SiCn- (12) formée sur le substrat SiCn+ (11), et d'une électrode de source (22) agencée en contact avec la couche SiCn- (12). La couche SiCn- (12) comprend une région de source n+ (14) de type de conductivité n. L'électrode de source (22) est agencée en contact avec la région de source n+ (14), et comprend une électrode de contact de source (16) contenant Ti, Al et Si.

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