Method of calibrating a constant voltage supply for an ultrasonic transducer of a wire bonding machine
US9016107B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Dec 21, 2007 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Dec 1, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/00014
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of calibrating a voltage for use with an ultrasonic transducer of a wire bonding machine in a constant voltage mode is provided. The method includes: (1) determining an impedance value associated with operation of the ultrasonic transducer; and (2) establishing an adjusted voltage level for use with the ultrasonic transducer in the constant voltage mode based on the determined impedance value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.