First, during the sintering process of the glass frosted material, if the temperature is too high or the holding time is too long, a continuous glass film will be formed between the metal and the substrate. This is because the contact angle of the glass to the substrate is higher than that of the metal. Contact angle is small. This structure will cause cracks in the sintered film under the effect of external stress, and damage the electrical properties of the film, and the conductors connected by the through holes cannot be conducted.
In addition, the amount of frosted glass should be moderate. Too much will cause the glass to float on the metal surface to form a glaze, which will affect the weldability. At the same time, it is also related to the matching of the metal and the holding time. Premature sintering of too thin glass frosted materials and long holding time can easily cause glaze and affect welding performance.
