摘要:
Providing a method of manufacturing a laser processed part by using a protective sheet for laser processing capable of effectively suppressing contamination of surface of workpiece by decomposition product, and processing at high precision, when processing the workpiece by optical absorption ablation of laser beam. It is also an object to present a protective sheet for laser processing for use in the manufacturing method of laser processed part.
摘要:
A semiconductor device capable of meeting the demand for fine-pitched wiring of semiconductor element and highly dense mounting thereof, as well as the demand for a thin structure thereof, which device being superior in the adhesion property of an insulating resin to be used for sealing a semiconductor element and a film carrier, and thus highly reliable. In FIG. 1, a conductive circuit (5) is embedded so that it will not be exposed at the both surfaces (6a, 6b) of an insulator layer (6), and conductive paths (7, 8) are formed in a pair from the both surfaces (5a, 5b) of the conductive circuit (5), the conductive paths slipping relative to each other in the direction of the surface of the conductive circuit (5). The conductive paths (7, 8) are respectively connected to bumps (9, 10), and the conductive circuit (5) and bumps (9, 10) are conducted via conductive paths (7, 8). The bump (9) formed on one end of the one conductive path (7) of the film carrier (2) contacts an electrode (12) of the semiconductor element (3) and is electrically connected, whereby the semiconductor element (3) is mounted on the film carrier (2). An insulating resin layer (4) is formed on one surface (6a) of the insulator layer (6) to cover the semiconductor element (3).
摘要:
A method for fabrication of a probe includes the steps of: (1) forming a structure wherein a contact part formed on one side of an insulating flexible substrate and a conductor formed on either side or the inside of the flexible substrate are electrically continued, and (2) joining the flexible substrate and a rigid frame substrate capable of supporting the tension in the planar direction of the flexible substrate at the outer periphery thereof, by bonding them by lamination pressing after heating, or by heating after lamination pressing, thereby applying a planar tension to the flexible substrate enclosed by the rigid substrate.
摘要:
An anisotropic conductive film is disclosed, comprising an insulating film having fine through-holes independently piercing the film in the thickness direction, each of the through-holes being filled with a metallic substance in such a manner that at least one end of each through-hole has a bump-like projection of said metallic substance having a bottom area larger than the opening of the through-hole. The metallic substance serving as a conducting path is prevented from falling off, and sufficient conductivity can be thus assured.
摘要:
A flexible printing base comprising a metal foil having formed thereon a polyimide layer is disclosed, wherein said metal foil has a centerline average roughness of not more than 0.7 .mu.m, and said polyimide mainly comprises a repeating unit represented by formula (I): ##STR1## and a repeating unit represented by formula (II): ##STR2## wherein l:m=x:y, wherein x represents a number not less than 45 and less than 70; y represents a number more than 30 and not more than 55; and x+y=100, said polyimide layer is formed by applying a solution of a polyamic acid mainly comprising a repeating unit represented by formula (III): ##STR3## and a repeating unit represented by formula (IV): ##STR4## wherein l and m are as defined above, in N,N'-dimethylformamide and/or N,N'-dimethylacetamide on a metal foil, followed by imidation. The flexible printing base is quite free from curling either in the state of a composite laminate but also in the state where the metal foil has been removed by etching.
摘要:
A manufacturing method of laser processed parts in which at least a pressure-sensitive adhesive layer is provided on a base material as a pressure-sensitive adhesive sheet for laser processing, using a material having specified physical properties. This method comprises adhering the pressure-sensitive adhesive sheet for laser processing to the laser beam exit side of the work by way of the pressure-sensitive adhesive layer, processing the work by irradiating the work with a laser beam of within 2 times of the irradiation intensity for forming a through-hole in the work, at higher than the irradiation intensity of threshold for inducing ablation of the work, and peeling the pressure-sensitive adhesive sheet for laser processing from the work after the machining. Therefore, contamination of the work surface by decomposition products can be effectively suppressed, and laser processed parts can be manufactured easily and at high production efficiency.
摘要:
A laser processing protection sheet (2) capable of effectively preventing contamination on the surface of an article to be processed by decomposition products when the article to be processed (1) is processed by the UV absorption ablation of a laser beam (7). A production method for a laser processed article (10) using the laser processing protection sheet (2). The laser processing protection sheet (2) is provided on the laser beam incident surface side of the article to be processed (1) when the article (1) is processed by the UV absorption ablation of the laser beam (7).
摘要:
The present invention provides a method for producing an optical member including the steps of subjecting a surface of a resin film to laser beam irradiation via a projection mask,.while sequentially moving either the resin film or the projection mask, or the both, and etching the resin film plural times to work into the shape of a lens, wherein the projection mask comprises plural light-transmitting parts or light-shielding parts having gradually different sizes; and a method for producing a molding die for the optical member. The method for producing an optical member and the method for producing a molding die for an optical member can be suitably used in, for example, a microlens sheet, a light-condensing sheet, a light-diffusing sheet, or the like.
摘要:
A laser processing protection sheet (2) capable of effectively preventing contamination on the surface of an article to be processed by decomposition products when the article to be processed (1) is processed by the UV absorption ablation of a laser beam (7). A production method for a laser processed article (10) using the laser. processing protection sheet (2). The laser processing protection sheet (2) is provided on the laser beam incident surface side of the article to be processed (1) when the article (1) is processed by the UV absorption ablation of the laser beam (7).
摘要:
A manufacturing method of laser processed parts is characterized in that at least a pressure-sensitive adhesive layer is provided on a base material as a pressure-sensitive adhesive sheet (2) for laser processing, using a material having specified physical properties, and this method comprises a step of adhering the pressure-sensitive adhesive sheet (2) for laser processing to the laser beam exit side of the work (1) by way of the pressure-sensitive adhesive layer, a step of processing the work by irradiating the work with a laser beam (6) of within 2 times of the irradiation intensity for forming a through-hole in the work (1), at higher than the irradiation intensity of threshold for inducing ablation of the work (1), and a step of peeling the pressure-sensitive adhesive sheet (2) for laser processing from the work (1) after the machining. Therefore, contamination of the work surface by decomposition products can be effectively suppressed, and laser processed parts can be manufactured easily and at high production efficiency.