What is the difference between ceramic wafer and ceramic substrate?

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What is the difference between ceramic wafer and ceramic substrate?

Ceramic wafer is a sheet material with electronic ceramics as the wafer to form a supporting base for film circuit elements and external fitting elements.

Ceramic substrate refers to the copper foil at high temperature directly bonded to the surface of the ceramic substrate (single or double) on the special process board.The ultra-thin composite substrate made of stone ceramic substrate has excellent electrical insulation performance, high thermal conductivity, excellent soft soldering and high adhesion strength, and can be like PCB board can be etched out of a variety of graphics, with great current-carrying capacity.Therefore, ceramic substrate has become the basic material of high power electronic circuit structure technology and interconnection technology.
Simply put, there are no wires on the substrate, and metal wires have been etched on the substrate.

Common characteristics of ceramic wafer and ceramic substrate
Strong mechanical stress, stable shape;High strength, high thermal conductivity, high insulation;Strong adhesion and corrosion resistance.
Excellent thermal cycle performance, cycle times up to 50,000 times, high reliability.
As PCB board (or IMS substrate) can be etched out of the structure of various graphics;No pollution, no pollution.
In pieces with wide temperature - 55 ℃ ~ 850 ℃;The thermal expansion coefficient is close to that of silicon, which simplifies the production process of power module.

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What is the difference between ceramic wafer and ceramic substrate?

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