Abstract:
One aspect of the present invention resides in a manufacturing method for a semiconductor package, including a covering step of forming a covering insulating layer that covers the surface of a semiconductor element, a film-forming step of forming a resin film on the surface of the covering insulating layer, a circuit pattern-forming step of forming a circuit pattern portion including recesses reaching the surfaces of electrodes of the semiconductor element and a circuit groove having a desired shape and a desired depth, a catalyst-depositing step of depositing a plating catalyst or a precursor thereof on the surface of the circuit pattern portion, a film-separating step of separating the resin film from the covering insulating layer, and a plating processing step of forming a circuit electrically connected to the electrodes, by applying electroless plating to the covering insulating layer, from which the resin film is separated.
Abstract:
PROBLEM TO BE SOLVED: To improve productivity of a circuit board by increasing the absorptivity of laser light of a resin film, in a method for manufacturing the circuit board including a step of forming a circuit pattern by irradiating the resin film formed on an insulating substrate surface with laser light.SOLUTION: This resin composition includes: a copolymer composed of a monomer containing a monomer unit having at least one carboxyl group and a monomer capable of copolymerizing with this monomer; and an ultraviolet absorber. In the resin composition, when the absorption coefficient per unit weight of the resin film 2 is ε1 in a solution in which the resin film 2 that is created by applying resin liquid of the resin composition is dissolved by a solvent, ε1 at a wavelength of light with which the resin film 2 is irradiated is 0.01 (L/(g.cm)) or more.
Abstract:
PROBLEM TO BE SOLVED: To provide good rewiring that has one end connected with a chip and the other end exposed to the surface of an insulating resin covering the chip in a stack chip semiconductor device.SOLUTION: A semiconductor chip is sealed by an insulating resin so that the wiring surface of the chip is exposed, rewiring that has one end connected with the wiring surface of the semiconductor chip and the other end extending to a position on the outside of the outer edge of the semiconductor chip is formed on the wiring surface side of the semiconductor chip in a sealed body thus obtained, a plurality of sealed bodies are stacked so that the positions of the semiconductor chips overlap in the stacking direction, and then a stacked body thus obtained is cut between the position of the outer edge of the semiconductor chip and the other end of the rewiring.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing an extremely reliable circuit board while reducing material loss by forming a resin film of a uniform thickness over an irregular surface of a structure by irradiating a resist formed over the surface of an insulation substrate with a laser beam to thereby form a circuit pattern.SOLUTION: A manufacturing method for a circuit board includes: a resist forming step to form a resin film over the surface of the insulation substrate; and a circuit forming step to form a circuit pattern by forming a concave portion of a depth larger than the thickness of the resin film with reference to the external surface of the resin film using a laser. The resin film is formed by means of electrostatic spray.