基本信息:
- 专利标题: PROCESS FOR DIP-SOLDERING PRINTED CIRCUIT BOARDS
- 专利标题(中):DIP焊接印刷电路板的工艺
- 申请号:PCT/DE1991000422 申请日:1991-05-17
- 公开(公告)号:WO1991019414A2 公开(公告)日:1991-12-12
- 申请人: FRIEDRICH, Dieter , FRIEDRICH, Gitta
- 专利权人: FRIEDRICH, Dieter,FRIEDRICH, Gitta
- 当前专利权人: FRIEDRICH, Dieter,FRIEDRICH, Gitta
- 优先权: DEP 19900518
- 主分类号: H05K03/34
- IPC分类号: H05K03/34
摘要:
The invention relates to a process for producing printed circuit boards with solder pads which are to be provided with a solder deposit and which are initially surrounded by a boundary layer of defined thickness which prevents soldering; the printed circuit board is then introduced into a solder bath in which the regions to be soldered are covered with a sealing element; when the printed circuit board is removed from the bath, the covering achieves a separation of the enclosed volumes of solder from the liquid solder in the dipping bath or in the soldering chamber, appropriate volumes of solder being defined in the cavities above the solder pads. Compared with the prior art, this has the advantage that the covering can be carried out by simple means and the process of forming the solder pads can be carried out separately from the actual dip soldering operation.