摘要:
Methods for opening a hard mask and a silicon-on-insulator substrate in a single process chamber are disclosed. In one embodiment, the method includes patterning a photoresist over a stack including an anti-reflective coating (ARC) layer, a silicon dioxide (SiO2) based hard mask layer, a silicon nitride pad layer, a silicon dioxide (SiO2) pad layer and the SOI substrate, wherein the SOI substrate includes a silicon-on-insulator layer and a buried silicon dioxide (SiO2) layer; and in a single process chamber: opening the ARC layer; etching the silicon dioxide (SiO2) based hard mask layer; etching the silicon nitride pad layer; etching the silicon dioxide (SiO2) pad layer; and etching the SOI substrate. Etching all layers in a single chamber reduces the turn-around-time, lowers the process cost, facilitates process control and/or improve a trench profile.
摘要:
Techniques for semiconductor processing are provided. In one aspect, a method for patterning one or more features in a semiconductor device comprises the following step. At least one critical dimension of the one or more features is reduced during etching of the antireflective material. A lithographic structure is also provided.
摘要:
The present invention provides articles made from structurally precise poly(propylene carbonate) and blends thereof. Provided articles include articles manufactured from poly(propylene carbonate) wherein the PPC has a high head-to-tail ratio, low ether linkage content, narrow polydispersity and low cyclic carbonate content. Also provided are articles made from, incorporating or coated with structurally precise PPC.
摘要:
A catalyst, co-catalyst, and/or chain transfer agent is added at a time after initiation of an addition polymerization reaction to produce a polymer product with a widened molecular weight distribution relative to having all of the components in the original reaction mixture. The catalyst, co-catalyst, or chain transfer agent may be added discretely or continuously to the reaction to produce a product with a bimodal, trimodal, or other broadened molecular weight distribution.
摘要:
The present invention provides articles made from structurally precise poly(propylene carbonate) and blends thereof. Provided articles include articles manufactured from poly(propylene carbonate) wherein the PPC has a high head-to-tail ratio, low ether linkage content, narrow polydispersity and low cyclic carbonate content. Also provided are articles made from, incorporating or coated with structurally precise PPC.
摘要:
The present invention provides polymer compositions having a tunable decomposition temperature. Suitable additives are disclosed for lowering the decomposition temperature of polymer compositions. The invention further provides methods of preparing such polymer compositions with tunable decomposition temperatures.
摘要:
The present disclosure is directed to, in part, an aliphatic polycarbonate polymerization reaction initiated by combining an epoxide with carbon dioxide in the presence of a catalytic transition metal-ligand complex to form a reaction mixture, and further quenching that polymerization reaction by contacting the reaction mixture with an acid containing a non-nucleophilic anion produces a crude polymer solution with improved stability and processability.
摘要:
The present disclosure provides, in part, a method for removing a catalyst from a product of catalyzed aliphatic polycarbonate polymerization reaction.
摘要:
A catalyst, co-catalyst, and/or chain transfer agent is added at a time after initiation of an addition polymerization reaction to produce a polymer product with a widened molecular weight distribution relative to having all of the components in the original reaction mixture. The catalyst, co-catalyst, or chain transfer agent may be added discretely or continuously to the reaction to produce a product with a bimodal, trimodal, or other broadened molecular weight distribution.