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4541results about How to "Inhibited Diffusion" patented technology

Method of epitaxial growth effectively preventing auto-doping effect

This invention relates to a method of epitaxial growth effectively preventing auto-doping effect. This method starts with the removal of impurities from the semiconductor substrate having heavily-doped buried layer region and from the inner wall of reaction chamber to be used. Then the semiconductor substrate is loaded in the cleaned reaction chamber to be pre-baked under vacuum conditions so as to remove moisture and oxide from the surface of said semiconductor substrate before the extraction of the dopant atoms desorbed from the surface of the semiconductor substrate. Next, under high temperature and low gas flow conditions, a first intrinsic epitaxial layer is formed on the surface of said semiconductor substrate where the dopant atoms have been extracted out. Following this, under low temperature and high gas flow conditions, a second epitaxial layer of required thickness is formed on the structural surface of the grown intrinsic epitaxial layer. Last, silicon wafer is unloaded after cooling. This method can prevent auto-doping effect during the epitaxial growth on semiconductor substrate and thus ensure the performance and enhance the reliability of the devices in peripheral circuit region.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI

Liquid crystal display device

ActiveUS20080137022A1Reduce sealing defectSuppressing spreadingNon-linear opticsLiquid-crystal displayElectrical and Electronics engineering
The present invention provides a liquid crystal display device with a narrow picture frame which reduces a sealing defect by suppressing spreading of an orientation film. In a region inside a sealing material and outside a display region, an uneven surface for suppressing spreading of the orientation film is formed. It is preferable that the uneven surface is formed using an insulation film and, at the same time, an etching stopper layer is formed below the insulation film which forms the uneven surface. It is more preferable that the uneven surface and the stopper layer are simultaneously formed with a layer used for forming pixels in a step for forming such a layer thus preventing the increase of manufacturing steps.
Owner:PANASONIC LIQUID CRYSTAL DISPLAY CO LTD +1

Acid tank sealing treatment system

The invention discloses an acid tank sealing treatment system. The acid tank sealing treatment system comprises connecting pipes, an acid mist removing device and a plurality of acid tanks, wherein the acid tanks are connected into the acid mist removing device through the connecting pipes for acid mist treatment. The acid tank sealing treatment system has the beneficial effects that acid mist ofthe acid tanks on an operation site can be treated in a centralized mode, single treatment in the prior art is improved, and the treatment efficiency is improved. The acid tanks are connected into theacid mist removing device through the connecting pipes for acid mist treatment, acid tank sealing on the operation site is achieved, and acid mist diffusion on the operation site is avoided.
Owner:YANTAI JEREH PETROLEUM EQUIP & TECH
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