content_image/913880.jpg content_image/913892.jpg content_image/913893.jpg content_image/913894.jpg content_image/913895.jpg content_image/913896.jpg content_image/913897.jpg content_image/913898.jpg content_image/913899.jpg content_image/913900.jpg content_image/913901.jpg content_image/913902.jpg content_image/913879.jpg content_image/913906.jpg content_image/913905.jpg content_image/913913.jpg content_image/913914.jpg content_image/913915.jpg content_image/913916.jpg content_image/913917.jpg
<img src='content_image/913880.jpg'>

<img src='content_image/913892.jpg'>

<img src='content_image/913893.jpg'>

<img src='content_image/913894.jpg'>

<img src='content_image/913895.jpg'>

<img src='content_image/913896.jpg'>

<img src='content_image/913897.jpg'>

<img src='content_image/913898.jpg'>

<img src='content_image/913899.jpg'>

<img src='content_image/913900.jpg'>

<img src='content_image/913901.jpg'>

<img src='content_image/913902.jpg'>

-continued 

<img src='content_image/913879.jpg'>

(A-2)-18 

(A-2)-19 

(A-2)-20 

(A-2)-21 

(A-2)-22 

(A-2)-23 

(A-2)-24 

(A-2)-25 

(A-2)-26 40 

(A-2)-27 

(A-2)-28 

(A-2)-29 

(A-2)-30 

Among the acid-labile groups shown by the formula (A-2), illustrative examples of the cyclic one include a tetrahydrofuran-2-yl group, a 2-methyltetrahydrofuran-2-yl group, a tetrahydropyran-2-yl group, and a 2-methyltetra› hydropyran-2-yl group. 

The base resin may be linked through an acid-labile group shown by the general formula (A-2a) or (A-2b) to form intermolecular or intramolecular crosslinking. 

<img src='content_image/913906.jpg'>

<img src='content_image/913905.jpg'>

In the above formulae, RL $^{40 }$and RL $^{41 }$represent a hydro- gen atom or a linear, branched, or cyclic alkyl group having 1 to 8 carbon atoms. Alternatively, RL $^{40 }$and RL 41 may be bonded to form a ring together with the carbon atoms to which these groups are bonded; and when the ring is formed, RL 40 and RL 41 , which participate in the ring formation, represent a linear or branched alkylene group having 1 to 8 carbon atoms. RL $^{42 }$represents a linear, branched, or cyclic alkylene group having 1 to 10 carbon atoms; Bl and Dl represent an integer of Oto 10, preferably Oto 5; and Cl 

<img src='content_image/913913.jpg'>

<img src='content_image/913914.jpg'>

<img src='content_image/913915.jpg'>

<img src='content_image/913916.jpg'>

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-continued 

(A-2)-31 

(A-2)-32 

(A-2)-33 

(A-2)-34 

(A-2)-35 

(A-2b) 

