Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1990-01-24
1991-10-29
Ryan, Patrick J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428210, 428426, 428432, 428901, 156 89, 156625, B32B 900
Patent
active
050615521
ABSTRACT:
A multi-layer ceramic substrate assembly comprising a multi-layer ceramic substrate including a via-conductor and an interconnecting line and having a surface, a first soldering pad on the surface of the substrate and electrically connected to the via-conductor, a second soldering pad on the surface of the substrate adjacent to the first soldering pad, a connecting pattern on the surface of the substrate for electrically connecting the first and second soldering pads, the connecting pattern being made of an electric conductor wettable with a solder, and a solder dam formed on the connecting pattern between the first and second soldering pads, the solder dam being made of a metal or a metal alloy or compound not wettable with a solder. The electric conductivity of the connecting pattern is carried by a metal having a good electric conductivity and the solder dam is made of a metal or a metal alloy or compound not wettable with a solder, whereby the solder dam stops a flow of a solder through the dam or under the dam. A simple and reliable process for forming such a solder dam is also provided.
REFERENCES:
patent: 3268653 (1966-08-01), McNutt
patent: 3568312 (1971-03-01), Perricone
patent: 3576722 (1971-04-01), Fennimore et al.
patent: 3742597 (1973-07-01), Davis
patent: 4490429 (1984-12-01), Tosaki et al.
Fujitsu Limited
Ryan Patrick J.
LandOfFree
Multi-layer ceramic substrate assembly and a process for manufac does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-layer ceramic substrate assembly and a process for manufac, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-layer ceramic substrate assembly and a process for manufac will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1399646