Calixarene compound and photoresist composition comprising same

A molecular glass compound comprising:

• A.) a tetrameric reaction product of:
• an aromatic compound of formula (I):
• C6R1x(OR2)y (I)
• wherein R1 is H, F, C1-20 alkyl, C1-20 haloalkyl, C6-20 aryl, C6-20 haloaryl, C7-20 aralkyl, or C7-20 haloaralkyl, R2 is H, C1-20 alkyl, C1-20 haloalkyl, x is 6-y and y is 2 or 3, at least one OR2 group is a hydroxy group, and at least two OR2 groups are meta to one another, and
• a polycyclic or fused polycyclic aromatic aldehyde of formula (II)
• Ar1—CHO (II)
• wherein Ar1 is a substituted, halosubstituted or unsubstituted C4-20 heterocyclic aromatic-containing moiety, or a substituted, halosubstituted or unsubstituted C8-20 fused polycylic aromatic moiety, and
• B.) an acid-removable protecting group as an adduct with the hydroxy group of the aromatic compound, a hydroxy group of the polycyclic or fused polycyclic aromatic aldehyde, or a combination comprising at least one of the foregoing.