Semiconductor device and method of manufacturing the same
US7759722B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2007 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | May 11, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/8063
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
When microfabrication is done, a reliable semiconductor device is offered.A semiconductor device has a semiconductor substrate which has a main front surface, a plurality of convex patterns formed on the main front surface of a semiconductor substrate so that each might have a floating gate and a control gate, a first insulating film formed so that the upper surface and the side surface of each of a plurality of convex patterns might be covered, and so that width might become large rather than the portion which covers the lower part side surface of a convex pattern in the portion which covers an upper part side surface, and a second insulating film that covers the upper surface and the side surface of the first insulating film so that the cavity between the adjacent convex patterns may be occluded. The position occluded by the second insulating film of a cavity is a position higher than the upper surface of a floating gate, and is a position lower than the upper surface of a control gate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.