摘要:
A printed circuit board is free from any residue of the carbide of resin produced on the surface of its copper foil exposed after boring a blind hole by means of a laser beam. Such a printed circuit board is adapted to have a blind hole 10 bored through an insulator 1 until the hole gets to the copper foil 3 arranged under the insulator by irradiating the insulator 1 with a laser beam. A laser beam absorbing region is provided between said insulator 1 and said copper foil 3.
摘要:
A diamond sintered product having diamond particles sintered with a suitable sintering aid is the most suitable as the material for the mold for optical element molding, because it has in combination the advantage of diamond that no fusion with glass at high temperature occurs and oxidation occurs with difficulty to give rise to no precipitation of lead, an appropriate hardness and also the advantage that mirror polishing is possible. "There is also disclosed a mold which has a diamond layer having a (100) face, made by the CVD method utilizing gas having 1-3% methane in hydrogen."
摘要:
For providing a semiconductor package with improved moisture resistance and high reliability and a production method thereof, a solder resist is also provided in an appropriate thickness between electrodes of conductor circuits on a surface of a substrate. The resist in these portions is obtained by patterning the solder resist while leaving the solder resist between the conductor circuits by removing the unnecessary solder resist under irradiation of a laser.
摘要:
For providing a semiconductor package with improved moisture resistance and high reliability and a production method thereof, a solder resist is also provided in an appropriate thickness between electrodes of conductor circuits on a surface of a substrate. The resist in these portions is obtained by patterning the solder resist while leaving the solder resist between the conductor circuits by removing the unnecessary solder resist under irradiation of a laser.
摘要:
In a method for forming bumps 19 on electrodes 32 of a wiring board 31, a fluid 14 containing conductive particles 16 and a gas bubble generating agent is supplied onto a first region 17 including the electrodes 32 on the wiring board 31. Then, a substrate 40 which has a protruding surface 13 having the same area as that of the first region 17 and formed on a main surface 18 of the substrate 40 having a larger area than that of the first region 17 is disposed so that the protruding surface 13 faces the first region 17 of the wiring board 31. Then, the fluid 14 is heated to generate gas bubbles 30 from the gas bubble generating agent contained in the fluid 14.
摘要:
A mold for use for press-molding an optical element, in which a molding surface of a mold base material is coated with a hard carbon film containing 0-5 atom% of hydrogen. It has a spin density of 1.times.10.sup.18 spin/cm.sup.3 or less and a film density of at least 1.5 g/cm.sup.3.
摘要翻译:一种用于模压光学元件的模具,其中模具基材的模制表面涂覆有含有0-5原子%氢的硬碳膜。 其自旋密度为1×1018 spin / cm 3以下,膜密度为1.5g / cm 3以上。
摘要:
This specification discloses a metallic rotational polygon mirror having a metallic member formed of aluminum or an alloy thereof, a thin film formed of at least one of chromium, tungsten and nickel on the metallic member, and a thin metal film of high reflection factor formed of at least one of gold, silver and copper on the thin film. The metallic rotational polygon mirror has a high reflection factor and a strong intimate contact property between the metallic member and the thin film and between the thin films, and has excellent corrosion resistance and durability.
摘要:
The present invention addresses the problem of providing a novel silicon substrate having a textured surface by dry-etching the surface of a silicon substrate having (111) orientation and thereby forming a texture thereon. The present invention provides a silicon substrate having (111) orientation, said silicon substrate having a textured surface that includes multiple protrusions which each comprise three slant faces and have heights of 100 to 8000 nm. This process for producing a silicon substrate includes: a step of preparing a silicon substrate having (111) orientation; and a step of blowing an etching gas onto the surface of the silicon substrate, said etching gas containing one or more gases selected from the group consisting of ClF3, XeF2, BrF3, BrF5 and NF3.
摘要:
A method for forming bumps 19 on electrodes 32 of a wiring board 31 includes the steps of: (a) supplying a fluid 14 containing conductive particles 16 and a gas bubble generating agent onto a first region 17 including the electrodes 32 on the wiring board 31; (b) disposing a substrate 40 having a wall surface 45 formed near the electrodes 32 for forming a meniscus 55 of the fluid 14, so that the substrate 40 faces the wiring board 31; and (c) heating the fluid 14 to generate gas bubbles 30 from the gas bubble generating agent contained in the fluid 14.
摘要:
A method for manufacturing a sub-harness comprises the steps of: holding a first connector housing in a guiding device for terminal insertion; holding a second connector housing in a continuity check tool; bringing a terminal at a first end of an electric wire with terminals at the both ends thereof into contact with a touch contact to make a specified light emitter of light emitters in the guiding device emit, said touch contact being connected to the guiding device via a main control device, said touch contact having a curved contact surface; inserting the terminal at the first end into a specified terminal-receiving chamber of terminal-receiving chambers in the first connector housing to bring the terminal at the first end into contact with a specified terminal contact of terminal contacts in the guiding device, said specified chamber being illuminated by said light emitter; and checking continuity between terminals at the first end and at a second end of the electric wire with a continuity check control device which is connected to the continuity check tool and the specified terminal contact, said terminal at the second end having been inserted into the second connector housing.