Resin composite electrolytic copper foil, copper clad laminate and printed wiring board

Abstract

The problem of the invention is to provide a resin composite electrolytic copper foil having further improved heat resistance and improved plate adhesion strength when plated after desmear treatment in the work process of an additive method. The solution is to form a roughened surface having a plurality of minute projections, a surface roughness (Rz) within a range of 1.0 μm to 3.0 μm and a lightness value of not more than 30 on one surface of an electrolytic copper foil, and form a layer of a resin composition containing a block copolymerized polyimide resin having a structure that imide oligomers of a first structural unit and a second structural unit are bonded alternately and repeatedly on the roughened surface.

1 . A resin composite electrolytic copper foil prepared by forming a roughened surface having a plurality of minute projections, a surface roughness (Rz) within a range of 1.0 μm to 3.0 μm and a lightness value of not more than 30 on one surface of an electrolytic copper foil (A), and forming a layer of a resin composition (B) containing a block copolymerized polyimide resin (a) having a structure that imide oligomers of a first structural unit and a second structural unit are bonded alternately and repeatedly on the roughened surface. 
     
     
         2 . A resin composite electrolytic copper foil according to  claim 1 , wherein in the roughened surface, the volume of a pore with a pore diameter of 100 to 1000 nm is not less than 0.1 mL/m 2 . 
     
     
         3 . A resin composite electrolytic copper foil according to  claim 1 , wherein the minute projection has a plurality of bored portions on the lateral when seen in the cross sectional surface along the thickness direction of the electrolytic copper foil. 
     
     
         4 . A resin composite electrolytic copper foil according to  claim 1 , wherein the minute projections are located by 200 to 25000 in an area of 100 μm×100 μm. 
     
     
         5 . A resin composite electrolytic copper foil according to  claim 1 , wherein the weight average molecular weights of the imide oligomers as the first and the second structural units in the block copolymerizes polyimide resin (a) are each independently 5000 to 30000. 
     
     
         6 . A resin composite electrolytic copper foil according to  claim 1 , wherein the block copolymerized polyimide resin (a) is a block copolymerized polyimide resin (a) having a block of the general formula (1) as a structural unit and a block of the general formula (2) as a structural unit. 
       
         
           
           
               
               
           
         
         (In the formulae, m and n are each not less than 2, and m: n=1:9 to 3:1) 
       
     
     
         7 . A resin composite electrolytic copper foil according to  claim 1 , wherein the resin composition (B) contains an inorganic filler (b). 
     
     
         8 . A resin composite electrolytic copper foil according to  claim 7 , wherein the resin composition (B) contains the inorganic filler (b) within a range of 5 to 50% by volume based on total 100% by volume of the block copolymerized polyimide resin (a) and the inorganic filler (b). 
     
     
         9 . A resin composite electrolytic copper foil according to  claim 1 , wherein the resin composition (B) contains a maleimide compound (c). 
     
     
         10 . A resin composite electrolytic copper foil according to  claim 9 , wherein in the resin composition (B), the content of the block copolymerized polyimide resin (a) and the maleimide compound (c) is 1:9 to 9:1 in the weight ratio. 
     
     
         11 . A resin composite electrolytic copper foil according to  claim 9 , wherein the maleimide compound (c) is 2,2-bis[4-(4-maleimidephenoxy)phenyl]propane. 
     
     
         12 . A resin composite electrolytic copper foil according to  claim 1 , wherein the thickness of the layer of the resin composition (B) is 1 μm to 10 μm. 
     
     
         13 . A copper clad laminate prepared by layer laminating a resin composite electrolytic copper foil according to  claim 1  and a B-stage resin composition. 
     
     
         14 . A copper clad laminate according to  claim 13 , wherein the B-stage resin composition layer contains a resin and an inorganic filler, and contains the inorganic filler within a range of 5 to 50% by volume based on total 100% by volume of the resin and the inorganic filler. 
     
     
         15 . A copper clad laminate prepared by forming a copper layer with plating on a surface of a copper clad laminate according to  claim 13  where copper is entirely removed. 
     
     
         16 . A printed wiring board using a copper clad laminate according to  claim 13 .