Silicon carbide semiconductor device and manufacturing method therefor

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10720492
SERIAL NO

16304783

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The width of the p type guard ring is set to match the interval between the adjacent p type guard rings, and the width of the p type guard ring is made larger as the interval between the p type guard rings becomes larger. The width of the frame portion is basically equal to the width of the p type deep layer so that the interval between the frame portions is equal to the interval between the p type deep layers. This makes it possible to reduce the difference in formation areas of the trenches per unit area in the cell portion, the connection portion and the guard ring portion. Therefore, when the p type layer is formed, the difference in the amount of the p type layer embedding into the trenches per unit area also decreases and the thickness of the p type layer is equalized.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
TOYOTA JIDOSHA KABUSHIKI KAISHA1 TOYOTA-CHO TOYOTA-SHI AICHI-KEN 471-8571
DENSO CORPORATION1-1 SHOWA-CHO KARIYA-CITY AICHI-PREF 448-8661

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mitani, Shuhei Kariya, JP 29 161
Suzuki, Katsumi Toyota, JP 204 2118
Takeuchi, Yuichi Kariya, JP 84 1118
Yamashita, Yusuke Nagakute, JP 123 540

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Jan 21, 2024
7.5 Year Payment $3600.00 $1800.00 $900.00 Jan 21, 2028
11.5 Year Payment $7400.00 $3700.00 $1850.00 Jan 21, 2032
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00