Patent ID: 8846522
Filing Date: 2014-09-30
Classification: H01L

Abstract:
1. A process for forming an air gap, the process comprising: (a) providing a substrate; (b) depositing a sacrificial layer with at least one organic precursor onto the substrate; (c) depositing a composite layer with a porogen that is the at least one organic precursor in (b) and at least one silica-containing precursor or organosilicate glass (OSG) precursor onto the substrate; (d) applying energy to the substrate having the sacrificial layer and the composite layer to remove both the sacrificial layer to provide air gaps and the porogen to form a porous layer; and Wherein (1) at least one singly or multiply unsaturated cyclic hydrocarbon having a cyclic structure and the formula C (2) at least one bicyclic hydrocarbon having a bicyclic structure and the formula C (3) at least one multiply unsaturated bicyclic hydrocarbon having a bicyclic structure and the formula C (4) at least one tricyclic hydrocarbon having a tricyclic structure and the formula C alpha-terpinene, limonene, cyclohexane, 1,2,4-trimethylcyclohexane, 1,5-dimethyl-1,5-cyclooctadiene, camphene, adamantane, 1,3-butadiene, substituted dienes, decahydronaphthelene, 1,5-cyclooctadiene, cyclooctane, cyclooctene, norbornadiene, 5-Ethylidene-2-norbornene, cyclopentene oxide and cyclopentanone; and depositing steps (b) and (c) are via a process selected from the group consisting of chemical vapor depositions (CVD) and plasma enhanced chemical vapor depositions (PECVD).