DS DS/EN 61249-7-1
DS DSEN 61249-7-1 1996-MAR-28 Materals for nterconnecton structures - Part 7 Sectonal specfcaton set for restranng core materals - Secton 1 Coppernvarcopper
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This specification gives the requirements for copper-clad Invar material for use in the fabrication of metal-clad laminated sheets, used for printed boards. The use of copper-clad Invar material boards modifies some properties of the boards, for example thermal capacity and coefficient of thermal expansion.