摘要:
On the surface of n-type layer of Ga.sub.1-x Al.sub.x As (0.ltoreq..times..ltoreq.1) having n-type layer, Au layer is formed as a first layer, and alloying treatment is performed after Ge layer, Ni layer and Au layer are sequentially formed. The first Au layer, the second Ge layer, the third Ni layer and the fourth Au layer have the following thickness:______________________________________ 1st layer Au 10-100 .ANG. 2nd layer Ge 50-200 .ANG. 3rd layer Ni 50-200 .ANG. 4th layer Au 200-1000 .ANG. ______________________________________ Thus, it is possible to form an ohmic electrode, which has low contact resistance and does not develop ball-up phenomenon.
摘要:
On the surface of n-type layer of Ga.sub.1-x Al.sub.x As (0.ltoreq.x.ltoreq.1) having n-type layer, Au layer is formed as a first layer, and alloying treatment is performed after Ge layer, Ni layer and Au layer are sequentially formed. The first Au layer, the second Ge layer, the third Ni layer and the fourth Au layer have the following thickness:______________________________________ 1st layer Au 10-100 .ANG. 2nd layer Ge 50-200 .ANG. 3rd layer Ni 50-200 .ANG. 4th layer Au 200-1000 .ANG. ______________________________________ Thus, it is possible to form an ohmic electrode, which has low contact resistance and does not develop ball-up phenomenon.
摘要:
According to the present invention, roughness are formed on the surface of III-V group compound semiconductor to prevent total reflection, and SiNx film is formed on rough surface. This makes it possible to increase external quantum efficiency by surface roughness. Further, bond strength is increased because SiNx film is furnished on the roughness. As the result, the detachment of SiNx film is prevented, moisture resistant property is improved, and service life of LED is extended by preventing oxidation.
摘要:
The present invention provides a refrigerant composition that is nonflammable, and ensures low LCCP and less burden on the environment. More specifically, the present invention relates a refrigerant composition containing difluoromethane (HFC32), pentafluoroethane (HFC125), and 2,3,3,3-tetrafluoropropene (HFO1234yf), the ratio of HFC32/HFC125/HFO1234yf being in a range surrounded by points (0/21/79 mass %), (16.6/25.3/58.1 mass %), and (0/28.4/71.6 mass %) in a ternary diagram of a refrigerant composition containing HFC32, HFC125, and HFO1234yf, and the composition essentially containing HFC32.
摘要:
A supercharging apparatus for an engine comprising a high-pressure stage supercharger having a high-pressure stage turbine arranged in an exhaust gas passage of the engine and a high-pressure stage compressor that is arranged in an intake gas passage of the engine and is driven by the high-pressure stage turbine, and a low-pressure stage supercharger having a low-pressure stage turbine arranged in the exhaust gas passage on the downstream side of the high-pressure stage turbine and a low-pressure stage compressor that is arranged in the intake air passage on the upstream side of the high-pressure stage compressor and is driven by the low-pressure stage turbine, wherein the low-pressure stage compressor has a capacity larger than a capacity of the high-pressure stage compressor, and the low-pressure stage turbine has a capacity equal to, or smaller than, a capacity of the high-pressure stage turbine.
摘要:
A data storing device of the present invention includes a cylindrical or hollow cylindrical data storing medium rotatable about its own axis and having a storage layer formed on its circumferential surface for storing data. A head adjoins the storage layer for writing or reading data in or out of the storage layer. A head moving mechanism causes the head to move back and forth along the axis of the data storing medium. A drive motor includes a stator and a rotor spaced from the stator and directly coaxially connected to the data storing medium.
摘要:
The invention provides a refrigerant comprising a mixture of three compounds selected from the group consisting of hydrofluorocarbons represented by the formula ClHmFn (1) wherein when l is 1, m is an integer of 1 or 2, n is an integer of 2 or 3 and m+n=4; when l is 2, m is an integer of 1 to 4, n is an integer of 2 to 5 and m+m=6; and when l is 3, m is an integer of 1 to 3, n is an integer of 5 to 7 and m+n=8.
摘要翻译:本发明提供一种制冷剂,其包含三种选自以下组中的三种化合物的混合物,所述三种化合物由式(Ⅳ)所示的氢氟烷代表,当l为1时,m为1或2的整数,n为2或3的整数,m + n = 4 ; 当l为2时,m为1〜4的整数,n为2〜5的整数,m + m = 6。 当l为3时,m为1〜3的整数,n为5〜7的整数,m + n = 8。
摘要:
The present invention provides:(1) a solvent composition comprising chloropentafluoropropane and 1,1-dichloro-1-fluoroethane; and(2) a solvent composition comprising chloropentafluoropropane and dichlorotrifluoroethane.
摘要:
An ultrasonic motor driving circuit has a drive duty generating circuit that intermittently outputs a drive request signal according to the battery voltage, and a drive signal output means that receives the drive request signal to output a drive signal. The drive signal is in the form of bursts with pause intervals, the pause intervals being variable with a change in the battery voltage thereby improving utilization of the battery capacity.