Abstract:
PROBLEM TO BE SOLVED: To provide a resin composition which is low in roughness of an insulating layer surface, and can form thereon a plated conductor layer having sufficient peel strength in a wet roughing step, and which is excellent in dielectric characteristics and a coefficient of thermal expansion. SOLUTION: The resin composition contains a cyanate ester resin and a specified epoxy resin, namely, (A) the cyanate ester resin and (B) a naphthylene ether type epoxy resin. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
Provided is a flame retardant adhesive composition including (A) a halogen-free epoxy resin, (B) a thermoplastic resin and/or a synthetic rubber, (C) a curing agent, (D) a nitrogen-containing polyphosphate compound, and (E) a curing accelerator. Also provided are an adhesive sheet having a layer including the above composition, and a protective layer for covering the layer including the composition; a coverlay film having an electrically insulating film, and a layer including the above composition provided on top of the film; a flexible copper-clad laminate having an electrically insulating film, a layer including the above composition provided on top of the film, and copper foil; and a method of bonding two substrates, including the steps of sandwiching the above adhesive sheet between two substrates, and curing the adhesive sheet. Further provided are a process for producing the adhesive sheet, a process for producing the coverlay film, and a process for producing the flexible copper-clad laminate. The halogen-free adhesive composition yields a cured product, on curing, that exhibits excellent flame retardancy and anti-migration properties. The composition can be used for producing an adhesive sheet, a coverlay film, and a flexible copper-clad laminate. The adhesive sheet can be used for a method of bonding two substrates.
Abstract:
PROBLEM TO BE SOLVED: To provide a bonding sheet which can mount an electronic part to a circuit board by a simple process and surely prevents shortcircuiting among electrode pads, and to provide an electronic circuit device using the same and its manufacturing method. SOLUTION: The bonding sheet 20 is formed by providing an adhesive filling portion 2 inside a base material 1 and filling the inside of the adhesive filling portion 2 with a conductive adhesive 3. The electronic circuit device 30 is formed by mounting an IC package 4 to a circuit board 7, wherein the bonding sheet 20 is interposed between the IC package 4 and the circuit board 7. A terminal electrode 5 is provided on the lower surface of the IC package 4, and an electrode bump 6 projects from the terminal electrode 5. A recess 8 is formed on the upper surface of the circuit board 7, wherein an electrode pad 9 is provided on the bottom of the recess 8. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an insulating sheet which can prevent, in simple configuration, short-circuiting between terminals and can improve workability in mounting. SOLUTION: An insulating sheet 1 includes a sheet-like heat conduction part 2 provided between an FET 10 and a heat sink 20. Furthermore, the insulating sheet 1 includes a terminal housing part 3 continued with the heat conduction part 2. In the terminal housing part 3, a space 4 is formed for individually housing root portions 11a of terminals 11 provided in the FET 10. The root portions 11a of the terminals 11 of the FET 10 are housed so as to be embedded in the space 4. A silicone rubber is rich in flexibility, a front side of the space 4 is opened, and the root portions 11a are easily housed in the space 4. Thus, dust can be suppressed from being lying between the terminals 11; and short-circuiting between the terminals 11 can be prevented. COPYRIGHT: (C)2010,JPO&INPIT