Ether-based polymers as photo-crosslinkable dielectrics

A polymer, comprising:

• at least one unit of formula (1):
• wherein:
• n is 0 or 1;
• m and p are independently from each other 0, 1, 2, 3, 4, 5 or 6,
• provided that the sum of n, m and p is at least 2, and n and p are not 0 at the same time;
• Ar1 and Ar2 are independently from each other a C6-14-arylene or a C6-14-aryl, which may be substituted with 1 to 4 substituents independently selected from the group consisting of a C1-30-alkyl, a C2-30-alkenyl, a C2-30-alkynyl, a C5-8-cycloalkyl, a C6-14-aryl and a 5 to 14 membered heteroaryl;
• X1, X2 and X3 are independently from each other and at each occurrence O or S;
• R1 and R2 are independently from each other and at each occurrence selected from the group consisting of a C1-30-alkyl, a C2-30-alkenyl, a C2-30-alkynyl, a C5-8-cycloalkyl, a C6-14-aryl and a 5 to 14 membered heteroaryl;
• C1-30-alkyl, C2-30-alkenyl and C2-30-alkynyl can be substituted with 1 to 5 substituents independently selected from the group consisting of a halogen, CN, a C5-6-cycloalkyl, a C6-10-aryl and a 5 to 10 membered heteroaryl;
• C5-8-cycloalkyl can be substituted with 1 to 5 substituents independently selected from the group consisting of a halogen, a C1-10-alkyl, CN, a C2-10-alkenyl, a C2-10-alkynyl, a C6-10-aryl and a 5 to 10 membered heteroaryl;
• and
• C6-14-aryl and 5 to 14 membered heteroaryl can be substituted with 1 to 5 substituents independently selected from the group consisting of a halogen, CN, a C1-10-alkyl, a C2-10-alkenyl, a C2-10-alkynyl and a C5-6-cycloalkyl.