Laminate and method

A method for preparing a laminate less than or equal to about 98 micrometers in thickness and having substantially diminished curling which comprises the step of laminating under heat and pressure a polyetherimide resin film between a layer of copper foil and a layer of woven glass fabric, wherein the combination of polyetherimide and fabric has a coefficient of thermal expansion that differs from the coefficient of thermal expansion of the copper foil by less than about 30 ppm.

A laminate less than or equal to about 98 micrometers in thickness and having substantially diminished curling comprising a thermoplastic resin film between a layer of metal foil and a layer of woven fabric, wherein the combination of thermoplastic and fabric has a coefficient of thermal expansion that differs from the coefficient of thermal expansion of the metal foil by less than about 30 ppm.

A laminate less than or equal to about 98 micrometers in thickness and having substantially diminished curling comprising a polyetherimide resin film between a layer of copper foil and a layer of woven glass fabric, wherein the combination of polyetherimide and fabric has a coefficient of thermal expansion that differs from the coefficient of thermal expansion of the copper foil by less than about 30 ppm.

A two-layer laminate less than or equal to about 98 micrometers in thickness consisting of a polyetherimide film and a layer of woven glass fabric, and having a CTE of less than about 45 ppm.

A three-layer laminate less than or equal to about 98 micrometers in thickness consisting of a layer of woven glass fabric with a layer of polyetherimide film laminated to each side of the fabric, and having a CTE of less than about 45 ppm.