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

An organic layer composition, comprising:

• a solvent;
• and
• a monomer represented by Chemical Formula 1,
• wherein, in Chemical Formula 1,
• X is a substituted or unsubstituted aromatic ring group,
• A, B, and C are each independently a group represented by Chemical Formula 2,
• k, m, and n are each independently 0 or 1, a sum of k, m, and n being 2 or 3,
• when k=m=1, A and B are different groups from each other, when k=n=1, A and C are different groups from each other, and when m=n=1, B and C are different groups from each other, and
• when k=m=n=1, at least two of A, B, and C are different groups from each other,
• wherein, in Chemical Formula 2,
• D and E are each independently a substituted or unsubstituted aromatic ring group, a substituted or unsubstituted heteroaromatic ring group, or a combination thereof,
• Z4 and Z5 are each independently a hydroxy group, a thionyl group, a thiol group, a cyano group, a substituted or unsubstituted amino group, a halogen atom, a halogen-containing group, or a combination thereof,
• w is 0 or 1, and
• * is a linking point.