摘要:
A multi-layer sheet which has a follow-up layer being composed of a resin composition containing a resin having a melting point, which is the melting peak temperature measured by DSC, in the range of 50 to 130 °C as a primary component, and a releasing layer being composed of a resin composition containing a resin having a melting point of 200 °C or higher as a primary component and being laminated on the above follow-up layer, wherein when the two releasing layers of the above multi-layer sheets are closely contacted with each other under a condition of 170 °C and 3 MPa for 30 minutes, they exhibit a blocking force of 0.1 N/cm or less as measured in accordance with ASTM D1893. The multi-layer sheet is excellent in heat resistance, releasing characteristics and follow-up characteristics to an irregular surface, exhibits excellent non-staining characteristics and also can be easily disposed of after use.
摘要:
A lead frame of a circuit board is punched in a direction opposite to a heat sink plate. Even if burrs are produced due to the punching, the burrs do not penetrate a sheet or short-circuit to the heat sink plate. A resist film tightly contacts on the periphery of a land of the lead frame of the circuit board, and a plated layer tightly contacts on the land. This prevents electronic components from defective mounting on the land.
摘要:
The anisotropic conductive tape (1) of the invention is used for electrical connection between opposing circuit electrodes and is provided with a tape-like base material (20) and with multiple adhesive layers (11b, 12b) formed in parallel on the main side of the base material (20) along the lengthwise direction of the base material (20), wherein at least two of the multiple adhesive layers have different structures.
摘要:
A method for fabricating a multilayer circuit board, including: preparing a film 1 with interlayer adhesive in which a first protective film 102 and a first interlayer adhesive 104 are stacked; preparing a first circuit board 2 having a first base 202 and a conductive post 204 protruding from the first base 202; stacking the surface of the first interlayer adhesive and the surface including the conductive post together; peeling off the first protective film 102; preparing a second circuit board 3 including a conductive pad 302 receiving the conductive post 204; and stacking and bonding the first circuit board 2 and the second circuit board 3 through the first interlayer adhesive 104 so that the conductive post 204 and the conductive pad 302 face each other, wherein in the peeling off, the first interlayer adhesive 104 at the top portion 206 of the conductive post is selectively removed while peeling off the first protective film 102.
摘要:
A lead frame on a circuit board is punched in a direction opposite to a radiation sheet, and burr, even if made by the punching, does not pass through a sheet to short-circuit the radiation sheet. A resist film is bonded to the land outer periphery of the lead frame of the circuit board, and plating film is bonded to the land surface to thereby prevent an incorrect mounting of electronic parts onto the land.
摘要:
The invention provides a method for adhering two substrates comprising: providing an adhesive film having a first surface and a second surface; irradiating the adhesive film with ultraviolet radiation to provide an activated adhesive film having a first activated surface and a second activated surface; cooling the activated adhesive film either while irradiating or immediately after irradiating the film; contacting the first activated surface with a first substrate; contacting the second activated surface with a second substrate; and applying heat and pressure to the first and second substrates to cure the activated adhesive film and to bond the substrates to one another.
摘要:
A resin-coated carrier having a sheet-like base, the sheet-like base corresponding to the shape of a PC board substrate on a relatively smaller scale, and a resin of a predetermined thickness covered over one side of the sheet-like base for bonding to a PC board substrate for making a PC board without causing an overflow of the resin.