Abstract:
The invention relates to the production of nanoporous silica dielectric films and to semiconductor devices and integrated circuits comprising these improved films. The nanoporous films of the invention are prepared using silicon containing pre-polymers and are prepared by a process that allows crosslinking at lowered gel temperatures by means of a metal-ion-free onium or nucleophile catalyst.
Abstract:
A film-forming composition comprising: a compound having a specific cage structure; a pore-forming agent; an adhesion promoter; and so on, an insulating film formed from the film-forming composition and an electronic device comprising the insulating film.
Abstract:
Disclosed are stable organo polysilica resin composition containing a B-staged organo polysilica resin and an organic acid, methods of stabilizing such B-staged organo polysilica resin compositions and methods of manufacturing electronic devices using such stable compositions.
Abstract:
A method of producing silicone foam includes the step of adding a mechanical foaming agent to uncured silicone. The mechanical foaming agent is a plurality of solid bodies insoluble in the silicone. The method also includes the steps of curing the silicone and removing the mechanical foaming agent as intact solid bodies from the silicone thereby providing a silicone foam.
Abstract:
The invention concerns a porous composite product in particular with high specific surface area, characterised in that it is formed of a polymeric material and at least 20% of one or several fillers, and in that the product is obtainable by extrusion. The invention also concerns a method for preparing a porous composite product characterised in that it consists in: a) forming a mixture containing one or several insoluble polymers, one or several soluble or calcinable polymers, one or several fillers; b) extruding said mixture for forming an extruded precursor product; c) eliminating the soluble or calcinable polymer(s) of the extruded precursor product; recuperating the porous composite product. The invention also concerns all extruded object consisting of a porous composite product in particular with high specific area. Finally it concerns an electrode formed of a film of porous composite product.
Abstract:
Porous dielectric materials having low dielectric constants useful in electronic component manufacture are disclosed along with methods of preparing the porous dielectric materials. Also disclosed are methods of forming integrated circuits containing such porous dielectric materials.
Abstract:
Porous polyimide dielectric materials having low dielectric constants useful in electronic component manufacture are disclosed along with methods of preparing the porous polyimide dielectric materials. Also disclosed are methods of forming integrated circuits containing such porous polyimide dielectric material.
Abstract:
A porous article having excellent heat resistance, a finely cellular structure, and a low dielectric constant; and a process for producing the porous article which comprises subjecting a polymer composition having a micro-domain structure comprising a continuous polymer phase and dispersed therein a discontinuous phase having an average diameter smaller than 10 &mgr;m to a treatment for removing the ingredient constituting the discontinuous phase by at least one operation selected from vaporization and decomposition and by an extraction operation to thereby make the polymer porous. The ingredient constituting the discontinuous phase has a weight average molecular weight of, e.g., 10,000 or lower. Liquefied carbon dioxide, supercritical carbon dioxide, or the like can be used as an extraction solvent for the ingredient constituting the discontinuous phase.
Abstract:
Biodegradable and biocompatible porous scaffolds characterized by a substantially continuous polymer phase, having a highly interconnected bimodal distribution of open pore sizes with rounded large pores of about 50 to about 500 microns in diameter and rounded small pores less than 20 microns in diameter, wherein the small pores are aligned in an orderly linear fashion within the walls of the large pores. Methods of preparing polymeric tissue scaffolds are also disclosed.
Abstract:
The present invention is a method for producing a nonwoven fabric from a water modifiable polyolefin-containing film. In order to produce the fabric where polyethylene is the minority constituent, a polymer blend is formed with the polyethylene as the dispersed phase and polyethylene oxide as the continuous phase. In another embodiment wherein the polyethylene is the majority constituent and the polyethylene oxide is the minority constituent of the film, a reactive blend created during processing exhibits an inverse phase morphology so that the polyethylene oxide becomes the continuous phase and the polyethylene becomes the dispersed phase. In either embodiment, the film is then treated with an aqueous solvent to remove the polyethylene oxide to produce the nonwoven, porous fabric. The resulting nonwoven, porous fabric has a silk-like hand and shine ideal for disposable personal hygiene articles, and is flushable through waste water disposal systems.