摘要:
An internal combustion engine comprises, an intake valve, an exhaust valve, an exhaust gas purifying catalyst, and a valve mechanism which closes the intake valve after a piston reaches the bottom dead center and opens the exhaust valve before the piston reaches the bottom dead center in a hot state of the internal combustion engine, advances the opening timing of the intake valve from the opening timing of the intake valve in the hot state and retards the closing timing of the intake valve from the closing timing of the intake valve in the hot state when the internal combustion engine is cold, and opens the exhaust valve in substantially the same timing as the opening timing of the exhaust valve in the hot state, and closes the exhaust valve at substantially the same timing as closing timing of the exhaust valve in the hot state when the internal combustion engine is cold.
摘要:
An engine includes, a cylinder head, an intake valve, an exhaust valve, and a first clearance adjusting mechanism for actuating the intake valve. The first clearance adjusting mechanism (1) maintains a first valve clearance when the intake valve and the cylinder head are in a cold state, such that the intake valve closes after a bottom dead center, and (2) maintains a second valve clearance, shorter than the first valve clearance, when a temperature of the intake valve is in a hot state and a temperature of the cylinder head is still in the cold state, after a cold start of the engine, such that an open timing of the intake valve is advanced and a close timing of the intake valve is retarded. The exhaust valve opens and closes at fixed predetermined timings regardless of a temperature of the exhaust valve and the cylinder head.
摘要:
A semiconductor device includes a semiconductor substrate, and a plurality of wiring lines provided on one side of the semiconductor substrate, each of the wiring lines having a connection pad portion. An overcoat film is provided on the wiring lines and the one side of the semiconductor substrate, The overcoat film has a plurality of openings in parts corresponding to the connection pad portions of the wiring lines. A plurality of foundation metal layers are respectively provided on inner surfaces of the openings of the overcoat film and electrically connected to the pad portions of the wiring lines. A plurality of projecting electrodes are respectively provided on the foundation metal layers in the openings of the overcoat film.
摘要:
A wafer process material is prepared which has a plurality of semiconductor formation regions of different planar sizes, each including a low dielectric constant film/wiring line stack structure component. A laser beam is applied onto a dicing street of the necessary semiconductor formation region and onto its straight extension in order to remove partial areas of the low dielectric constant film/wiring line stack structure components of the necessary semiconductor formation region and the unnecessary semiconductor formation region so that first groove and the second groove are formed. A protective film is formed in the second groove formed in the unnecessary semiconductor formation region and on the low dielectric constant film/wiring line stack structure component. An upper wiring line and a sealing film are formed on the protective film, and a semiconductor wafer is cut along the dicing street.
摘要:
A semiconductor substrate in a wafer state having one surface provided thereon a plurality of external connection electrodes is stacked onto a support film. The wafer-state semiconductor substrate stuck on the support film is cut into a plurality of chip size semiconductor substrates, whereby the adjacent semiconductor substrates are separated from each other, and each semiconductor substrate is provided with at least one of the external connection electrodes. At least one protection film is formed on the other surface of the chip size semiconductor substrates, and on a peripheral side surface thereof that the chip size semiconductor substrates, which are adjacent to each other, are separated from each other.
摘要:
A semiconductor device includes a semiconductor substrate which has a plurality of semiconductor device formation regions and alignment mark formation region having the same planar size as that of the semiconductor device formation region, a plurality of post electrodes which are formed in each semiconductor device formation region, and an alignment post electrode which is formed in the alignment mark formation region and smaller in number than the post electrodes formed in each semiconductor device formation region.
摘要:
A semiconductor substrate in a wafer state having one surface provided thereon a plurality of external connection electrodes is stacked onto a support film. The wafer-state semiconductor substrate stuck on the support film is cut into a plurality of chip size semiconductor substrates, whereby the adjacent semiconductor substrates are separated from each other, and each semiconductor substrate is provided with at least one of the external connection electrodes. At least one protection film is formed on the other surface of the chip size semiconductor substrates, and on a peripheral side surface thereof that the chip size semiconductor substrates, which are adjacent to each other, are separated from each other.
摘要:
A semiconductor device includes a semiconductor substrate which has a plurality of semiconductor device formation regions and alignment mark formation region having the same planar size as that of the semiconductor device formation region, a plurality of post electrodes which are formed in each semiconductor device formation region, and an alignment post electrode which is formed in the alignment mark formation region and smaller in number than the post electrodes formed in each semiconductor device formation region.
摘要:
A semiconductor device includes a semiconductor substrate, and a plurality of wiring lines provided on one side of the semiconductor substrate, each of the wiring lines having a connection pad portion. An overcoat film is provided on the wiring lines and the one side of the semiconductor substrate. The overcoat film has a plurality of openings in parts corresponding to the connection pad portions of the wiring lines. A plurality of foundation metal layers are respectively provided on inner surfaces of the openings of the overcoat film and electrically connected to the pat portions of the wiring lines. A plurality of projecting electrodes are respectively provided on the foundation metal layers in the openings of the overcoat film.
摘要:
A semiconductor device includes a semiconductor substrate, and a plurality of wiring lines provided on one side of the semiconductor substrate, each of the wiring lines having a connection pad portion. An overcoat film is provided on the wiring lines and the one side of the semiconductor substrate. The overcoat film has a plurality of openings in parts corresponding to the connection pad portions of the wiring lines. A plurality of foundation metal layers are respectively provided on inner surfaces of the openings of the overcoat film and electrically connected to the pat portions of the wiring lines. A plurality of projecting electrodes are respectively provided on the foundation metal layers in the openings of the overcoat film.