Abstract:
An adhesive composition is provided. The adhesive composition includes a mixture (A), wherein the mixture (A) includes a first component (a), a cross-linking agent (b), and a second component (c), wherein the second component (c) includes a calcium-containing complex compound or a calcium-containing compound. Based on the total weight of the mixture (A), a content of the first component (a) is from 40 to 80 wt %, a content of the cross-linking agent (b) is from 20 to 60 wt %, and a content of the second component (c) is from 1 to 20 wt %. Specifically, the calcium-containing complex compound is selected from the group consisting of a compound represented by formula (1), a compound represented by formula (2), a compound represented by formula (3), and a compound represent by formula (4), and the calcium-containing compound is selected from the group consisting of a compound represented by formula (5) and a compound represent by formula (6).
Abstract:
An insulation film of a signal transmission line includes a substrate layer, and a bonding layer arranged on the substrate layer for directly covering metal conductors of the signal transmission line, wherein the bonding layer is made of a polyolefin copolymer resin or a polyolefin resin mixture.
Abstract:
A cover layer of a printed circuit board has a polymer film, a reflective composite layer and an adhesive layer. The polymer film has a melting point greater than 260° C. The reflective composite layer is mounted on one side surface of the polymer film and has a first reflective pigment. The adhesive layer is mounted on another side surface of the polymer film. Also, at a range of wavelength where a reflectivity of the cover layer is greater than 89%, absorption of the polymer film to the same range of wavelength is less than 35%. The cover layer is laminated on a printed circuit board and after surface mount technology process at a temperature ranging from 160° C. to 320° C., the cover layer has a reflectivity over 89% without yellowing and delamination.