360results about How to "Not easy to warp" patented technology

Disclosed is a double-coated pressure-sensitive adhesive sheet for fixing a flexible printed circuit board, which includes at least a pressure-sensitive adhesive unit including a plastic base film having a thickness of 13 [mu]m or less, and pressure-sensitive adhesive layers on both sides of the plastic base film. The pressure-sensitive adhesive layers are formed from an acrylic polymer containing, as essential monomer components, a polar-group-containing monomer and an alkyl (meth)acrylate whose alkyl moiety being a linear or branched-chain alkyl group having 2 to 14 carbon atoms. The pressure-sensitive adhesive unit has a thickness of 60 [mu]m or less, the double-coated pressure-sensitive adhesive sheet shows an outgassing of 1 [mu]g / cm2 or less when heated at 120 DEG C. for 10 minutes, and shows a split distance (lifting) of 1.5 mm or less.

First, a trench formed in parts of a semiconductor wafer, a sealing film and others corresponding to a dicing street and both sides thereof. In this state, the semiconductor wafer is separated into silicon substrates by the formation of the trench. Then, a resin protective film is formed on the bottom surface of each silicon substrate including the inner part of the trench. In this case, the semiconductor wafer is separated into the silicon substrates. However, a support plate is affixed to the upper surfaces of the columnar electrode and the sealing film via an adhesive layer. Therefore, when the resin protective film is formed, it is possible to prevent the entirety including the separated silicon substrates from being easily warped.

The invention discloses a colorful rubber floor mat and a manufacturing method of the colorful rubber floor mat. The manufacturing method of the colorful rubber floor mat includes the steps that waste rubber is smashed to serve as bottom-layer particles, then the smashed waste rubber and adhesives are evenly mixed, and a molded bottom layer is formed in a heated and pressurized mode; raw materials including ethylene-propylene-diene monomer, rubber oil, toner, white carbon black, ultraviolet-resistant agents, accelerants, zinc oxide, antioxidants, calcium carbonate and the like are evenly mixed, banburying and open milling are sequentially carried out, rubber is cut into pieces, the rubber pieces are cooled and smashed to serve as face-layer particles, then the smashed rubber pieces and adhesives are evenly mixed, and a molded face layer is formed in a heated and pressurized mode; finally the bottom layer and the face layer are bonded with the hot mold technology. The service life of the colorful rubber floor mat manufactured with the manufacturing method is as long as 5 years-8 years; the colorful rubber floor mat can be resistant to the 180-DEG C high temperature; the buffering performance is good; a slightly-protruding particle feeling is achieved on the surface, a special soft feeling is achieved during treading, and the colorful rubber floor mat has the elasticity and is resistant to sliding; no harmful matter is contained; the colorful rubber floor mat is basically free of influences of expansion caused by heat and contraction caused by cold, and is safe, comfortable, durable and attractive in appearance.

The invention provides a stiffening plate, which is formed by at least a layer of polyimide and at least a layer of polyetherimide which are in alternative arrangement. The polyetherimide layer is made of a polyetherimide material; and the general formula of the structure of the polyetherimide material is A. The invention further provides a stiffening flexible circuit board comprising the stiffening plate. The stiffening flexible circuit board has the advantages of little possibility of warping and better structural stability.