Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1986-11-18
1988-11-08
Kittle, John E.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428421, 428901, 174 685, 361104, 361119, 361124, B32B 300, H05K 100, H02H 504
Patent
active
047833599
ABSTRACT:
A preferably low dielectric constant polymeric bonding layer is applied or bonded (i.e., laminated or coated) to at least one side of a preferably low dielectric constant polymeric delay line substrate. Preferably, the melting or softening point of the bonding film is lower than the melting or softening point of the substrate so that the application (e.g. lamination) step is carried out at a temperature which is above the softening point of the bonding film, but below the softening point of the substrate (thereby insuring the integrity of the delay line circuit). Thereafter, the delay line/bonding layer assembly is rolled up and head sealed so as to melt the bonding layer, thus heat sealing the delay line package. As the package heats up (in, for example, a tightly fitting die), the materials expand and provide sufficient pressure to bond the circuit together.
REFERENCES:
patent: 4303959 (1981-12-01), Roberts et al.
patent: 4376927 (1983-03-01), McGalliard
Fleischer Cathy A.
Traskos Richard T.
Kittle John E.
Rogers Corporation
Ryan P. J.
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