Chip resistor
US7782173B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2006 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Sep 27, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C17/006
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The chip resistor 10 includes a ceramic substrate 11 that is shaped like a rectangular parallelepiped. Mounted on the lower surface of the ceramic substrate 11 are a resistive element 12 that is made mainly of a low-resistance, low-TCR copper-nickel alloy, first and second electrode layers 13, 14 that form a two-layer structure and cover both longitudinal ends of the resistive element 12, and an insulating protective layer 15 for covering the remaining area of the resistive element 12. The resistive element 12 is positioned within a region inside the peripheral border of the lower surface of the ceramic substrate 11. The chip resistor 10 also includes end-face electrodes 17 that are positioned on both longitudinal end faces of the ceramic substrate 11. The second electrode layers 14 and end-face electrodes 17 are covered by plating layers 18-21. This chip resistor 10 is to be face-down mounted with both electrode layers 13, 14 positioned on a wiring pattern 31 of a circuit board 30.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.