摘要:
Provided are a circuit board with enhanced moisture resist and the method of manufacturing the circuit board, and a circuit device and a method of manufacturing the circuit device. A circuit board of the present invention includes: a substrate; wirings formed on the main surface of the substrate; a cover layer covering the wirings excluding the regions to be connectors; back electrodes formed on the bottom surface of the substrate; and through-hole electrodes formed so as to penetrate the substrate, and thereby connecting the wirings and the back electrodes. On surfaces of each of the wirings in this circuit board, convex portions on the periphery of the substrate are set larger in width than convex portions in a center portion of the substrate. With this configuration, adhesion reliability between the wirings and the cover layer under a thermal cycle load can be enhanced.
摘要:
A method of manufacturing a circuit apparatus includes forming a plurality of pierced holes in a metal substrate. A first wiring layer is formed on one side of the metal substrate via a first insulating layer, and a second wiring layer is formed on the other side of the metal substrate via a second insulating layer. A conductor layer is formed in at least some of the plurality of pierced holes to establish a connection between the first wiring layer and the second wiring layer. A circuit element is connected to the first wiring layer on the one side of the metal substrate. When a plurality of pierced holes are formed, protrusions are formed on a surface of the metal substrate at least along either edge of each of the pierced holes provided with the conductor layer to protrude in a convex manner from the surface of the metal substrate.
摘要:
A circuit board and a circuit apparatus using the same which can prevent displacement and film exfoliation ascribable to thermal expansion, and suppress a drop in reliability at increasing temperatures. The circuit board of the circuit apparatus includes a metal substrate having pierced holes as a core member. Protrusions are formed on the top ends of the pierced holes, and depressions are formed in the bottom ends of the pierced holes. Wiring pattern layers are formed on both sides of this metal substrate via respective insulating layers. In order to establish electrical connection between the wiring pattern layers, a conductor layer which connects the wiring pattern layers is formed through the metal substrate via the pierced holes. The conductor layer thereby establishes electrical conduction between the wiring pattern layers. Furthermore, a semiconductor chip is directly connected to the surface side of the circuit board via solder balls.
摘要:
An electrostatic copying apparatus is provided wherein a stationary original document image is projected onto a photosensitive member during movement of an optical device for exposure. An electrostatic latent image formed on the photosensitive member is transferred onto a copy sheet and is fixed. A jam detecting means is provided for immediately detecting a copy sheet being jammed along a transport path. A cleaning device removes residual toner particles remaining on the photosensitive member by means of magnetic force and stores the removed toner particles after a transferring operation. The occurrence of a jam is detected immediately, and thus a fault or an accident of the electrostatic copying apparatus due to the jam is prevented from continuing.
摘要:
A fixing and heating device for an electrostatic copying apparatus includes a fixing roller which (a) remains stationary at least until a toner is softened, (b) is driven at a low speed to even the surface temperature of the fixing roller when the surface temperature is lower than a temperature suitable for fixing when the surface temperature and is equal to the temperature suitable for fixing except during a fixing operation, and (c) is driven at a speed suitable for fixing when the surface temperature is suitable for fixing during the fixing operation.
摘要:
A fixing and heating device for an electrostatic copying apparatus includes a fixing roller which (a) remains stationary at least until a toner is softened, (b) is driven at a low speed to even the surface temperature of the fixing roller when the surface temperature is lower than a temperature suitable for fixing and when the surface temperature is equal to the temperature suitable for fixing except during a fixng operation, and (c) is driven at a speed suitable for fixing when the surface temperature is suitable for fixing during the fixing operation.
摘要:
A water jacket core (10) includes a base part (11) and is provided with an intermediate female thread part (15) in that base within a region surrounded by tangent lines (18, 19) that are parallel to a center line (17) passing through the centers of a plurality of bore pin insertion bores (12) for forming cylinder bores and are in contact with the bore pin insertion bores and by an intermediate position for the adjacent bore pin insertion bores.
摘要:
The object of the present invention is to provide a casting method capable of simultaneously attaining the shortening of cycle time and the improvement in casting quality.The pressure allowing the molten metal level to go up to the positions of from P0 to P4 is applied to the molten metal within a molten metal reservoir 1. Then, the pressure of P4 is maintained for a predetermined time. During this time, the molten metal which comes into contact with an upper die 4 is cooled earlier than the molten metal being in contact with another die. Through this cooling the molten metal shrinks. However, since the pressure of P4 is maintained, the molten metal is supplied from the lower side to a shrunk portion, so as not to cause shrinkage cavity or underfill.
摘要:
A manufacturing technology is provided capable of improving the reliability of a semiconductor module having a via contact connected to an electrode part of a semiconductor device. A conductive bump is formed on an insulating layer such that the end of the conductive bump is in contact with an electrode of a semiconductor substrate. By pressure-molding the assembly using a press machine, the semiconductor substrate, the conductive bump, and the insulating layer are integrated. With this, the conductive bump is allowed to embed itself in the insulating layer while maintaining contact with the electrode. The insulating layer is subject to laser irradiation from above so as to form an aperture exposing the conductive bump. Subsequently, the upper surface of the insulating layer and the interior surface of the aperture are plated with copper by electroless plating and electroplating so as to form a copper plating layer, and a via contact is formed in the aperture so as to coat the inner wall of the aperture.
摘要:
A circuit board and a circuit apparatus using the same which can prevent displacement and film exfoliation ascribable to thermal expansion, and suppress a drop in reliability at increasing temperatures. The circuit board of the circuit apparatus includes a metal substrate having pierced holes as a core member. Protrusions are formed on the top ends of the pierced holes, and depressions are formed in the bottom ends of the pierced holes. Wiring pattern layers are formed on both sides of this metal substrate via respective insulating layers. In order to establish electrical connection between the wiring pattern layers, a conductor layer which connects the wiring pattern layers is formed through the metal substrate via the pierced holes. The conductor layer thereby establishes electrical conduction between the wiring pattern layers. Furthermore, a semiconductor chip is directly connected to the surface side of the circuit board via solder balls.