On-chip power inductor
US7875955B1 · kind B1 · utility
23Cited by
24References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2007 |
| Grant date | Jan 25, 2011 |
| Priority date | — |
| Expiry date | Mar 13, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/3011
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An on-chip inductor structure for a DC-DC power regulator circuit merges the switching transistor metallization with the inductor. Thick top level conductor metal that is used to strap the transistor array and to lower its on-state resistance is also used to extend the power inductor into the transistor array. Thus, the structure includes three basic components: a power inductor that spirals around the transistor array, the transistor array itself, and the transistor array metallization that is used to form a distributed inductance situated over the transistor array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.