Polymer, organic layer composition, organic layer, and method of forming patterns

An organic layer composition, comprising:

• a solvent;
• and
• a polymer including a moiety represented by the following Chemical Formula 1,
• wherein, in Chemical Formula 1,
• * is a linking point to a neighboring atom,
• m is 0 or 1,
• A1 and A2 are each independently a divalent group including one of the following moieties,
• wherein, in the above compounds,
• R1, R2 and R3 are each independently hydrogen, a hydroxy group, a methoxy group, an ethoxy group, a halogen, a substituted or unsubstituted C6 to C30 aryl group, or a combination thereof,
• Z1 to Z6 are each independently a hydroxy group, a methoxy group, an ethoxy group, a halogen, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 cycloalkenyl group, a substituted or unsubstituted C1 to C20 alkylamine group, a substituted or unsubstituted C7 to C20 arylalkyl group, a substituted or unsubstituted C1 to C20 heteroalkyl group, a substituted or unsubstituted C2 to C30 heterocycloalkyl group, a substituted or unsubstituted C2 to C30 heteroaryl group, a substituted or unsubstituted C1 to C4 alkyl ether group, a substituted or unsubstituted C7 to C20 arylalkylene ether group, a substituted or unsubstituted C1 to C30 haloalkyl group, or a combination thereof, and
• a, b, c, d, e, and f are each independently an integer of 0 to 2,
• A3 and A4 are each independently a divalent group represented by Chemical Formula 2 or Chemical Formula 3, below,
• wherein, in Chemical Formula 2,
• X1 and X2 are each independently hydrogen or a substituted or unsubstituted C6 to C30 aryl group, and
• at least one of X1 and X2 is a substituted or unsubstituted C6 to C30 aryl group,
• wherein, in Chemical Formula 3,
• X3 is a substituted or unsubstituted C6 to C30 arylene group, and
• X4 to X7 are each independently a substituted or unsubstituted C6 to C30 aryl group.