The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 22, 2020
Filed:
Feb. 25, 2020
Headway Technologies, Inc., Milpitas, CA (US);
Koji Shimazawa, Cupertino, CA (US);
Weihao Xu, San Jose, CA (US);
Headway Technologies, Inc., Milpitas, CA (US);
Abstract
A near field transducer (NFT) is formed between a waveguide and main pole at an air bearing surface (ABS). The NFT includes a rod-like front portion (PG) and a substantially triangular shaped back portion (PG) with a dielectric separation layer therebetween. PGis formed on a first dielectric layer with thickness tand refractive index (RI) while PGis on a second dielectric layer with thickness tand having refractive index (RI) where t>t, and RI>RIwhile PGhas a tapered backside at angle 45+15 degrees to promote efficient energy transfer from PGto PGand reduce NFT heating. A dielectric layer that induces poor adhesion with PGmay be inserted between below PGat the ABS to cause Au recession to occur at the PGleading side thereby preventing voids at the PGtrailing side and ensuring good ADC performance.