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    • 5. 发明授权
    • Multilayered ceramic circuit board
    • 多层陶瓷电路板
    • US4598167A
    • 1986-07-01
    • US634066
    • 1984-07-25
    • Nobuyuki UshifusaSatoru OgiharaTakanobu Noro
    • Nobuyuki UshifusaSatoru OgiharaTakanobu Noro
    • B32B15/08B32B15/02H01L23/498H01L23/538H05K1/03H05K3/46H05K1/00
    • H01L23/5384H01L23/49883H01L23/49894H05K1/0306H01L2224/16225H01L2924/09701H01L2924/15192H01L2924/15312
    • A multilayered ceramic circuit board, formed by sintering together a plurality of unit ceramic circuit boards, wherein each unit ceramic circuit board includes a ceramic layer, a patterned electrically conductive layer and through hole conductors formed in the ceramic layer for connecting the patterned electrically conductive layers of the respective unit ceramic circuit boards to form a predetermined wiring circuit. The patterned electrically conductive layers and the through hole conductors have a coefficient of thermal expansion which is greater than the coefficient of thermal expansion of the ceramic layers, wherein the difference between the coefficients of thermal expansion is selected to be less than 100.times.10.sup.-7 /.degree.C., and the through holes have decreased pitch. The conductive layers and conductors can be formed of a metal such as gold, silver or copper, with a low softening point glass filler to reduce the coefficient of thermal expansion of the conductive layers and conductors.The multilayered ceramic circuit board according to the present invention is less sensitive to cracks due to thermal stress.
    • 一种多层陶瓷电路板,其通过将多个单元陶瓷电路板烧结在一起形成,其中每个单位陶瓷电路板包括陶瓷层,图案化导电层和形成在陶瓷层中的通孔导体,用于连接图案化的导电层 以形成预定的布线电路。 图案化的导电层和通孔导体的热膨胀系数大于陶瓷层的热膨胀系数,其中热膨胀系数之间的差选择为小于100×10 -7 /℃ C.,通孔的间距减小。 导电层和导体可以由诸如金,银或铜的金属与低软化点玻璃填料形成,以降低导电层和导体的热膨胀系数。 根据本发明的多层陶瓷电路板对于热应力对裂纹的敏感性较差。