Switching element, antenna switch circuit and radio frequency module using the same
US7899412B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2010 |
| Grant date | Mar 1, 2011 |
| Priority date | — |
| Expiry date | Jul 29, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
Abstract
A switching element is provided that realizes an stabilize a potential between the gates of the multi-gates without an increase in the insertion loss, and an antenna switch circuit and a radio frequency module each using the switch element. The switching element includes two ohmic electrodes 39, 40 formed on a semiconductor substrate, at least two gate electrodes 41, 42 disposed between the two ohmic electrodes, and a conductive region 45 disposed between the adjacent gate electrodes among the at least two gate electrodes, a field effective transistor being structured by the two ohmic electrodes, the at least two gate electrodes, and the conductive region. The conductive region has a wider portion that is wider in width than the conductive region interposed between the adjacent gate electrodes on one end thereof. The distance between the adjacent gate electrodes is narrower than the width of the wider portion. Resistors 44, 46 are connected in series between the two ohmic electrodes through the wider portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.