Silicon-containing underlayers

Abstract

Methods of manufacturing electronic devices employing wet-strippable underlayer compositions comprising a condensate and/or hydrolyzate of a polymer comprising as polymerized units one or more first unsaturated monomers having a condensable silicon-containing moiety, wherein the condensable silicon-containing moiety is pendent to the polymer backbone, and one or more condensable silicon monomers are provided.

What is claimed is: 
     
         1 . A composition comprising: (a) one or more solvents; (b) a condensate and/or hydrolyzate of (i) one or more condensed silicon-containing polymers comprising as polymerized units one or more first unsaturated monomers having a condensable silicon-containing moiety, wherein the condensable silicon-containing moiety is pendent to the polymer backbone, and (ii) one or more condensable silicon monomers; and (c) one or more crosslinkers free of Si—O linkages 
     
     
         2 . The composition of  claim 1  wherein at least one condensable silicon monomer has the formula (8)
   Si(R 50 ) p (X) 4-p    (8)
 
 wherein p is an integer from 0 to 3; each R 50  is independently chosen from a C 1-30  hydrocarbyl moiety and a substituted C 1-30  hydrocarbyl moiety; and each X is independently chosen from halogen, C 1-10  alkoxy, —OH, —O—C(O)—R 50 , and —(O—Si(R 51 ) 2 ) p2 —X 1 ; X 1  is independently chosen from halogen, C 1-10  alkoxy, —OH, —O—C(O)—R 50 ; each R 51  is independently chosen from R 50  and X; and p2 is an integer from 1 to 10. 
 
     
     
         3 . The composition of  claim 2  wherein p=0 or 1. 
     
     
         4 . The composition of  claim 1  wherein the condensable silicon-containing moiety has the formula
   *-L-SiR 1   b Y 1   3-b    
 wherein L is a single bond or a divalent linking group; each R 1  is independently chosen from H, C 1-10 -alkyl, C 2-20 -alkenyl, C 5-20 -aryl, and C 6-20 -aralkyl; each Y 1  is independently chosen from halogen, C 1-10 -alkoxy, C 5-10 -aryloxy, C 1-10 -carboxy; b is an integer from 0 to 2; and * denotes the point of attachment to the polymer backbone. 
 
     
     
         5 . The composition of  claim 4  wherein L is a divalent linking group. 
     
     
         6 . The composition of  claim 5  wherein the divalent linking group is an organic radical having from 1 to 20 carbon atoms and optionally one or more heteroatoms. 
     
     
         7 . The composition of  claim 4  wherein the divalent linking group has the formula —C(═O)—O-L 1 - wherein L 1  is a single bond or an organic radical having from 1 to 20 carbon atoms. 
     
     
         8 . The composition of  claim 1  wherein at least one first unsaturated monomer has the formula (1) 
       
         
           
           
               
               
           
         
         wherein L is a single bond or a divalent linking group; each R l  is independently chosen from H, C 1-10 -alkyl, C 2-20 -alkenyl, C 5-20 -aryl, and C 6-20 -aralkyl; each of R 2  and R 3  are independently chosen from H, C 1-4  alkyl, C 1-4  haloalkyl, halogen, C 5-20 -aryl, C 6-20  aralkyl, and CN; R 4  is chosen from H, C 1-10  alkyl, C 1-10  haloalkyl, halogen, C 5-20 -aryl, C 6-20  aralkyl, and C(═O)R 5 ; R 5  is chosen from OR 6  and N(R 7 ) 2 ; R 6  is chosen from H, and C 1-20  alkyl; each R 7  is independently chosen from H, C 1-20  alkyl, and C 6-20  aryl; each Y 1  is independently chosen from halogen, C 1-10 -alkoxy, C 5-10 -aryloxy, C 1-10 -carboxy; and b is an integer from 0 to 2. 
       
     
     
         9 . The composition of  claim 1  wherein the condensate and/or hydrolyzate further comprises as polymerized units one or more second unsaturated monomers free of a condensable silicon-containing moiety. 
     
     
         10 . The composition of  claim 9  wherein at least one second unsaturated monomer has an acidic proton and having a pKa in water from −5 to 13. 
     
     
         11 . The composition of  claim 9  wherein at least one second unsaturated monomer has the formula (2) 
       
         
           
           
               
               
           
         
         wherein Z is chosen from an acid decomposable group, a C 4-30  organic residue bound to the oxygen through a tertiary carbon, a C 4-30  organic residue comprising an acetal functional group, and a monovalent organic residue having a lactone moiety; and R 10  is independently chosen from H, C 1-4  alkyl, C 1-4  haloalkyl, halogen, and CN. 
       
     
     
         12 . The composition of  claim 1  wherein the condensate and/or hydrolyzate further comprises as polymerized units one or more unsaturated monomers having a chromophore moiety. 
     
     
         13 . The composition of  claim 12  wherein the chromophore moiety is pendent from the polymer backbone. 
     
     
         14 . A method comprising (a) coating a substrate with the composition of  claim 1  to form a coating layer; (b) curing the coating layer to form a polymeric underlayer; (c) disposing a layer of a photoresist on the polymeric underlayer; (d) pattern-wise exposing the photoresist layer to form a latent image; (e) developing the latent image to form a patterned photoresist layer having a relief image therein; (f) transferring the relief image to the substrate; and (g) removing the polymeric underlayer by wet stripping. 
     
     
         15 . The method of  claim 14  wherein the polymeric underlayer is removed by wet stripping.