摘要:
A method of forming a pn junction with a Group IIB-VIB compound semiconductor containing Zn is disclosed, the method including preparing an n type semiconductor region either locally or entirely in a Group IIB-VIB compound semiconductor crystal obtained by relying on a crystal growth method in liquid phase using a temperature difference technique, and subjecting this crystal to a thermal annealing in a Zn solution or in a Zn atmosphere to produce an n type region. Crystal growth is conducted while controlling the vapor pressure of the constituent Group IVB element to produce a p type region. A combination of all these steps gives a more stable pn junction.
摘要:
A gallium arsenide static induction transistor of normally-off type simple in manufacture and exhibiting a superior function and suitable for use in low and medium power operation in integrated circuit is obtained by arranging so that its channel region has a length l (.mu.m), a width (.mu.m) and an impurity concentration N (cm.sup.-3), and that the ratio l/w is 0.5-5.0 and that the product Nw.sup.2 is not larger than 2.5.times.10.sup.15 cm.sup.-3..mu.m.sup.2.
摘要翻译:通过布置使得其通道区域具有长度l(μm),获得了常规关闭型砷化镓静电感应晶体管,其制造简单并且表现出优异的功能并且适用于集成电路中的低功率和中等功率操作, 宽度(μm)和杂质浓度N(cm-3),比率l / w为0.5-5.0,产品Nw2不大于2.5×10 15 cm -3。 亩。
摘要:
A semiconductor device having its carrier-injecting region formed with a Schottky structure, and arranged so that the current flowing through the Schottky barrier by virtue of tunnel effect is controlled by a controlling electrode to thereby control the drain or collector or anode current. Thus, this device has a large current density and a large current gain. This device can be used not only as a discrete one, but also it is quite suitable when applied to integrated circuits.
摘要:
This invention relates to a semiconductor image sensors and more particularly, to a back-illuminated-type static induction transistor image sensors.FIGS. 4A to 4C show the back illuminated type SIT image sensors operating in the electron depletion storing mode, where the n.sup.+ buried floating region 23 serves as storage region.
摘要:
In a static induction type semiconductor device comprising a semiconductor region having one conductivity type and a low impurity concentration and gate regions having an opposite conductivity type and a high impurity concentration formed in the semiconductor region to thereby define a channel region between these gate regions, there is provided a subsidiary semiconductor region having the one conductivity type and a relatively high impurity concentration either around each gate region to leave an effective channel region in the semiconductor region, or adjacent to the effective channel region in the entire channel region on the drain side. By so constructing the device, this effective channel region has a relatively low potential difference even when the channel region is completely depleted, and provides a relatively wide current path. The subsidiary semiconductor regions establish a relatively high potential difference near the gate regions so that the distance between the gate regions can be made substantially small. In case the subsidiary semiconductor regions are provided around the gate regions, the built-in potential at the junction will become large so that, even at the time of forward biasing, the minority carrier injection from the gate to the channel will become small. Also, this composite channel structure can be effectively applied to recessed gate device and split gate device as well.
摘要:
A static induction transistor of the type wherein carriers are injected from a source to a drain across a potential barrier induced in a current channel and wherein the height of the potential barrier can be varied in response to a gate bias voltage applied to a gate and to a drain bias voltage applied to the drain to thereby control the magnitude of a drain current of the transistor. The product of the channel resistance R.sub.c and the true transconductance G.sub.m of the transistor is maintained less than one and the product of the true transconductance and the series resistance R.sub.s of the transistor is maintained greater than or equal to one in the low drain current region in the operative state of the transistor. The series resistance R.sub.s is the sum of a resistance of the source, a resistance from the source to the current channel, and the channel resistance from the entrance of the current channel to the position of maximum value (extrema point) of the potential barrier in the current channel. This static induction transistor has the advantage that the current-voltage characteristic curve is nearly linear over a very wide range of drain current including the low drain current region. In an upside-down structure, the above-mentioned conditions can be easily attained by selecting respective impurity concentrations and thicknesses of a substrate and an epitaxial layer grown thereon.
摘要:
Vertical type field effect transistors are disclosed including one of the highly doped source, gate and drain regions disposed on one of the main opposite faces of one of the semiconductor substrate and the remaining region or regions disposed on the other mainface of the substrate. At least one of the regions is divided into a plurality of elongated slender portions and metallic electrodes are disposed in ohmic contact with the respective regions so as to be identical in configuration to the latter. The highly doped regions themselves may form electrodes.
摘要:
A luminescent diode comprises a p.sup.+ type substrate, at least one electron-hole recombination unit consisting of a p-type layer of a certain band gap and an n-type layer of a wider band gap epitaxially grown on said p-type layer to form a hetero junction at the interface therebetween, and a low resistivity contact disposed on an outermost surface of said unit opposite to said substrate. In the unit, said p-type layer is positioned closer to said substrate than said n-type layer. Light emitted in the vicinity of the hetero junction in the p-type layer of the unit is transmitted through this hetero junction and the n-type layer to emit from the outermost surface of the unit.
摘要:
In a static induction transistor of the type wherein carriers are injected from a source region to a drain region across a potential barrier induced in a current channel, and wherein the height of the potential barrier can be varied in response to a gate bias voltage applied to a gate to thereby control the magnitude of a drain current of the transistor. The product of the channel resistance R.sub.c and the true transconductance (G.sub.m) of the transistor is maintained less than one and the product of the true transconductance and the series resistance R.sub.s of the transistor is maintained greater than or equal to one in the main operative state of the transistor. The series resistance R.sub.s is the sum of a resistance of the source, a resistance from the source to the current channel, and the channel resistance from the entrance of the current channel to the position of maximum value (extrema point) of the potential barrier in the current channel. This static induction transistor has the advantage that the current-voltage characteristic curve is nearly linear over a very wide range of drain current including the low drain current region.
摘要:
A field effect transistor comprises a semiconductor channel, a source and a drain electrode formed at the opposite ends of the channel and a gate electrode provided on the side of the channel. The channel has a small impurity density and therefore the depletion layer extending from the gate goes deep into the channel to substantially close the conductive portion of the channel even in the absence of a gate voltage. The drain current will not flow where the drain voltage is below a certain threshold voltage, and will flow where the drain .[.volage.]. .Iadd.voltage .Iaddend.is above the threshold voltage exhibiting a .Iadd.substantially .Iaddend.linear resistance characteristic. This drain-current to drain-voltage characteristic simulates the anode-current to anode-voltage characteristic of the triode vacuum tube very closely.