Manufacture method of inhomogeneous ceramic dielectric substrate

Abstract

An embodiment of the invention provides a manufacture method of an inhomogeneous ceramic dielectric substrate, which includes sequentially winding and laminating ceramic blank sheets with different dielectric constants on a preset cylindrical core, and pressing the sheets into ceramic blanks with dielectric constants changing in a gradient mode; performing cutting separation on the ceramic blanks wound and laminated on the cylindrical core along the gradient changing direction of the dielectric constants, and obtaining ceramic blank blocks; using a preset ceramic core blank the same as the cylindrical core in shape and size as a central shaft, splicing at least two ceramic blank blocks into a cylinder with the dielectric constant changing from the central shaft to the outside in a gradient mode, and obtaining the inhomogeneous ceramic dielectric substrate after cold isostatic pressing and high-temperature sintering. The inhomogeneous ceramic dielectric substrate manufactured through the embodiment of the manufacture method can meet requirements for dielectric substrate electromagnetic characteristics.

Description

【Technical field】 [0001] The invention relates to the technical field of preparation of dielectric substrates, in particular to a preparation method of a non-uniform ceramic dielectric substrate. 【Background technique】 [0002] Fiber-reinforced resin matrix composites are widely used as substrates for circuit boards and metamaterials. Traditional fiber-reinforced resin matrix composites are prepared from epoxy resins, fillers, and glass fibers. It is characterized by low price, but has the disadvantages of large thermal expansion coefficient, large dielectric loss, and large frequency temperature coefficient. The ceramic substrate has the characteristics of small thermal expansion coefficient and good performance, so it occupies a very important position in the growing electronic ceramics industry. [0003] In the prior art, the casting method is used to prepare the ceramic substrate. The specific process is to mix ceramic powder with additives such as dispersant and adhes...

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Problems solved by technology

[0004] However, the ceramic dielectric substrate prepared in the prior art is a dielectric substrate with a uniform dielectric constant, which is difficult to meet the requirements for the electromagnetic properties of the dielectric substrate

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