Circuit Board Having an Asymmetric Layer Structure
Abstract:
A circuit board is described which includes a layer composite with at least one dielectric layer which includes a planar extension in parallel with respect to an xy-plane which is spanned by an x-axis and a y-axis perpendicular thereto, and which includes a layer thickness along a z-axis which is perpendicular with respect to the x-axis and to the y-axis; and at least one metallic layer which is attached to the dielectric layer in a planar manner. The layer composite along the z-axis is free from a symmetry plane which is oriented in parallel with respect to the xy-plane, and the dielectric layer includes a dielectric material which has an elastic modulus E in a range between 1 and 20 GPa and along the x-axis and along the y-axis a coefficient of thermal expansion in a range between 0 and 17 ppm/K. A method of manufacturing such a circuit board is also described. Further, a method of manufacturing a circuit board structure comprising two asymmetric circuit boards and a method of manufacturing two processed asymmetric circuit boards from a larger circuit board structure is described.
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