| 摘要 |
<p>PURPOSE:To obtain a highly moisture-resistant and highly heat-resistant reliable multilayer electronic circuit board by forming film-shaped elements such as conductive circuits, a resistor, and a capacitor directly on the surface of a porous ceramic sintered body and then filling the pores with resin. CONSTITUTION:The lower faces of film-shaped conductive circuits 12 and film- shaped resistor 13 are held in the uneven surfaces and among many ceramic grains 10 forming a porous ceramic sintered body 11. The pores among the ceramic grains 10 of the porous ceramic sintered body 11 remain filled with resin 14. As described above, a multilayer electronic circuit board consists of an electronic circuit board 2 sandwiched between electronic circuit boards 1 through insulating layers 3 and said electronic circuit boards 1 and 2 have film-shaped elements on both faces. Therefore, the boards are strengthened and made hard to break and easy to machine, preventing processing defects such as break and chipping. Gas is prevented from passing and the environment effect is lessened.</p> |
