The Effect of Anisotropic Shrinkage in Tape-Cast Low-Temperature Cofired Ceramics on Camber Development of Bilayer Laminates

Authors


  • R. Bordia—contributing editor

  • This work was financially supported by the National Science Council of the Republic of China under grant no: 96-2221-E-007-019.

†Author to whom correspondence should be addressed. e-mail: jhjean@mse.nthu.edu.tw

Abstract

The effect of anisotropic shrinkage in a tape-cast low-temperature cofired ceramics (LTCC) on the camber development of bilayer laminate is investigated. The bilayer laminate cambers toward the direction with low-powder-packing density, which also exhibits a larger shrinkage rate. This result is in agreement with that predicted by using the viscous analogy for the constitutive relationships of a porous sintering compact. To produce thin, camber-free substrates, laminates stacked by more than three-layer tapes with alternating 90° rotation are needed.

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