Apparatus and method for automatic evaluation of a bond created by an ultrasonic transducer
US4606490A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1982 |
| Grant date | Aug 19, 1986 |
| Priority date | — |
| Expiry date | Aug 24, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K20/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Apparatus and method for determining if a lead bond created by an ultrasonic transducer has the characteristics of a good bond. The current supplied to the transducer is monitored and the envelope of the supplied current is sampled periodically and supplied to a computing means. The computing compares selected characteristics of the sampled signal with characteristics previously determined to create good lead bonding. The results of this comparison are stored in a bond quality control data processing system and supplied to a host data processing system. The host data processing system can take appropriate action. The bond quality control data processing system can control the power supplied to the ultrasonic transducer to provide better characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.