摘要:
In a manufacturing method of a printed circuit board comprising a process of forming a circuit pattern on the surface of the base substrate (13) of which surface is at least composed of an insulative material, a process of forming the insulative layer (15) composed of mixed composites of more than two kinds of organic resins having a different etching rate by a dry etching process on the surface of the base substrate (13) including the circuit pattern, a process of perforating the hole (17) on the insulative layer (15) by a laser beam, a process of roughing the surface of the insulative layer (15) by a dry etching process, a process of forming the conductive film (19) for a foundation of an electroplating process by a vacuum film forming method and a process of forming the conductive layer (20) on the conductive film (19) by an electroplating process so as to connect the conductive layer (20) with the circuit pattern (14) electrically. Accordingly, a printed circuit board having an extremely small anchor profile and a fine pattern can be manufactured in fewer manufacturing processes by utilizing the dry etching process and a spattering film forming process.
摘要:
A method of producing a hose-connector assembly, including the steps of forming by extrusion an inner resin tube layer, forming by extrusion an outer rubber protector tube layer having substantially the same length as the inner resin tube layer, so as to cover the outer surface of the inner resin tube layer over the entire length of the inner resin tube layer, to obtain a laminar tubular blank consisting of the inner resin tube layer and the outer rubber protector tube layer, cutting the laminar tubular blank into pieces, and press-fitting an end portion of a tubular connector in each of at least one of the opposite end portions of the inner resin tube.
摘要:
A hinge assembly has a tubular member having a longitudinal axis, a peripheral surface, and a slot formed in the peripheral surface. A button member extends into the tubular member to undergo sliding movement in an axial direction along the longitudinal axis of the tubular member and to undergo rotational movement relative to the tubular member. A pin member is connected to the button member and extends into the slot of the tubular member to undergo movement therein during sliding and rotational movement of the button member relative to the tubular member. The button member is biased in a preselected direction of rotation relative to the tubular member by a first biasing member. The button member is biased in an axial direction by a second biasing member.
摘要:
A semiconductor device having an electrically erasable and programmable nonvolatile memory, for example, a rewritable nonvolatile memory including memory cells arranged in rows and columns and disposed to facilitate both flash erasure as well as selective erasure of individual units of plural memory cells. The semiconductor device which functions as a microcomputer chip also has a processing unit and includes an input terminal for receiving an operation mode signal for switching the microcomputer between a first operation mode in which the flash memory is rewritten under control of a processing unit and a second operation mode in which the flash memory is rewritten under control of separate writing circuit externally connectable to the microcomputer.
摘要:
An image forming apparatus is composed of an image forming unit and a main controlling unit. The user can combine the image forming unit and main controlling unit of different types having different printing conditions such as image clock frequency, system speed and printing start timing, etc. Information items for determining resolution, image clock frequency, system speed time up to the beam generation timing from the horizontal synchronizing signal, time up to the beam generation timing from the vertical synchronizing signal and number of rotations of an optical beam deflecting device are shared with the main controlling unit and image forming unit through communication.
摘要:
The method of making the magnetic resistance element comprises the steps of: forming a first magnetizable layer, a non-magnetizable layer and a second magnetizable layer, in this order, on an insulating layer; providing a resist layer for forming a main part of the magnetic resistance element on the second magnetizable layer; etching side faces of the first magnetizable layer, the non-magnetizable layer and the second magnetizable layer to form into slope faces by ion milling from the second magnetizable layer side; forming terminals on the slope faces; and removing the resist layer, wherein a part of the first magnetizable layer which is located outside of the slope faces is left on the insulating layer when the side faces of the first magnetizable layer, the non-magnetizable layer and the second magnetizable layer are etched by ion milling.
摘要:
Provided is a storage case for a diffraction grating, which accommodates the diffraction grating in a constant orientation, so as to improve efficiency in the operation for assembling the diffraction grating. The storage sections each accommodate a diffraction grating Each storage section forms a storage space for accommodating a diffraction grating. The storage space is equipped with a rib for engaging the outer peripheral portion of the diffraction grating.
摘要:
A single chip semiconductor integrated circuit device having a central processing unit (CPU) and a flash memory which stores data to be processed by the CPU and which provides data to the CPU through the data bus in response to accessing instructions from the CPU through the address bus. The flash memory is constituted by a plurality of memory blocks each of which has a plurality of electrically programmable nonvolatile memory cells arranged in rows and columns in which each nonvolatile memory cell is coupled to one of a plurality of word lines and one of a plurality of data lines of the flash memory. The memory blocks formed can be facilitated with different memory capacities, including through controlling the number of rows or columns of memory cells associated therewith. Sources of all of the memory cells within each memory block are connected to a single source line which is fed by a predetermined voltage from a corresponding one of plural source voltage control circuits, for flash erasing the memory cells in that memory block in an erasing operation. In accordance with another feature of the flash memory, a control register, included within a device and under the control of the CPU, is employed to control the erasing of data stored in one or more of the memory blocks, simultaneously.
摘要:
A lens includes a center-of-gravity adjusting section in order to prevent the center of gravity of the lens from shifting due to removal of a gate portion formed during molding, thereby providing an optical lens which is easily handled and a method of making the optical lens. An optical lens having a flange at the outer periphery of an optically functioning portion includes a gate-cut section formed by cutting off a part of the flange together with a gate portion, continuously with the flange, and a center-of-axis adjusting section, formed by removing a part of the flange, for positioning the center of gravity in alignment with the optical axis of the optically functioning portion.
摘要:
According to the invention, a primary winding of an ignition coil is coupled with an insulated-gate bipolar transistor (IGBT). The IGBT is controlled by a current restriction circuit, which includes a control transistor for performing the on-off operation of the IGBT such that the IGBT is made conductive upon occurrence of an ignition control signal, and nonconductive, when a primary current of the ignition coil reaches a certain value depending on a reference voltage determined by a bias circuit. The bias circuit has a condenser, which is charged by a base current of the control transistor to change the base potential of the transistor slowly, when the transistor is made nonconductive.