Aligner
US6252649A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Feb 2, 1999 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Feb 2, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/0082
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention is to provide an aligner which may produce the printed circuit works having no defects due to the incomplete alignment of the film-mask and the work, wherein the film-mask F having aligning marks 3 and the work K having aligning marks 4 are closely contacted with each other, and then the aligned conditions of the aligning marks 3 and 4 are detected, if the aligned conditions are detected to be out of the range of a predetermined tolerance, the close contact of the film-mask F and the work K is canceled, and the same aligning operation is repeated until the aligned conditions are detected to be within the range of a predetermined tolerance, so that the products of inferior quality may be prevented from being produced due to the incomplete alignment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.