Reuse paste manufacturing method and reuse paste

Abstract

A method of manufacturing a reuse paste includes the steps of preparing a fiber piece housing paste, fabricating a filtered recovery paste and fabricating a reuse paste. At the step of preparing a fiber piece housing paste, there is prepared a fiber piece housing paste including a conductive paste having conductive powder and a resin, and a fiber piece taken away from a prepreg to be used for manufacturing a circuit board. At the step of fabricating a filtered recovery paste, the fiber piece housing paste in a paste state is filtered as it is by using a filter and a filtered recovery paste is thus fabricated. At the step of fabricating a reuse paste, at least one of a solvent, a resin and a paste having a different composition from the filtered recovery paste is added to the filtered recovery paste, and the reuse paste is thus fabricated.

1 - 17 . (canceled) 
     
     
         18 . A reuse paste obtained by a method of manufacturing a reuse paste, the method comprising the steps of:
 preparing a fiber piece housing paste including a conductive paste having conductive powder and a resin, and a fiber piece taken away from a prepreg to be used for manufacturing a circuit board;   filtering the fiber piece housing paste in a paste state as it is by using a filter for fabricating a filtered recovery paste; and   adding at least one of a solvent, a resin and a paste having a different composition from the filtered recovery paste to the filtered recovery paste for fabricating a reuse paste.   
     
     
         19 . The reuse paste according to  claim 18 , wherein a fiber having a length of ten times as great as an average particle diameter of the conductive powder or more is contained in the reuse paste at a ratio of 10 wt % or less of all of the fiber pieces in the reuse paste. 
     
     
         20 . The reuse paste according to  claim 18 , wherein a fiber having a length of less than three times as great as an average particle diameter of the conductive powder that is contained in the reuse paste at a ratio of 5 wt % or less of all of the fiber pieces in the reuse paste.