To improve productivity and to enhance reliability by subjecting ceramic sintered compact blocks to a pressure reduction to discharge the air in non-through-holes, taking these blocks out of paste and subjecting the blocks to the pressure reduction until the non-through-holes appear, then rotating or vibrating the blocks to remove the excess paste.

The ceramic sintered compact blocks 1 formed with the non- through-holes 11 are arranged in the base part of a meshed immersion vessel 2 and are immersed into the Ag paste 6, thereafter, the blocks are put together with the paste vessel 5 into a hermetic vessel 7. The inside of this vessel is then evacuated to vacuum. The pressure reduction is executed until air, etc. in the non-through-holes 11 appear as bubbles in the paste 6. The meshed immersion vessel 2 is taken out and is further put into a hermetic vessel 7 and is subjected again to the pressure reduction. At this time, the pressure reduction is executed until the non-through-holes 11 clogged by the Ag paste 6 appear. Next, all of the ceramic sintered compact blocks 1 are rotated and are put into the meshed rotary vessel 4 of a rotation/vibration device 14 and the excess Ag paste 6 is removed by the rotation of an arrow 31 and the vibration in an arrow 32 direction.