摘要:
The present invention relates to an electron emitting device having a structure for efficiently emitting electrons. The electron emitting device has a substrate comprised of an n-type diamond, and a pointed projection provided on the substrate. The projection comprises a base provided on the substrate side, and an electron emission portion provided on the base and emitting electrons from the tip thereof. The base is comprised of an n-type diamond. The electron emission portion is comprised of a p-type diamond. The length from the tip of the projection (electron emission portion) to the interface between the base and the electron emission portion is preferably 100 nm or less.
摘要:
An electron emitting device 2 comprises an electron emitting portion 6 made of diamond. At an electron emission current value of 10 μA or more, a deviation of the electron emission current value over one hour is within ±20% in the electron emitting device 2. The number of occurrence of step-like noise changing the electron emission current value stepwise is once or less per 10 minutes.
摘要:
An electron emission device which is smaller, able to operate at lower voltage and more efficient than the conventional device is provided. The device contains a light emitting device to irradiate light to a cathode wherein at least an electron emission face of the cathode is made of diamond. By composing the device in such a way, the voltage to draw out electrons can be lowered with a wide margin compared to the conventional device, and thus a small device which can be operated with low voltage may be obtained. The light emitting device can be formed as one unit with the cathode and it can also be that the light emitting device and the electrode are made of diamond. Furthermore, the electron emission face of the cathode is preferably an n- or p-type diamond semiconductor.
摘要:
A logical operation element and logical operation circuit are provided that are capable of high speed and a high degree of integration.A logical operation circuit has a construction wherein, in a logical operation element, the anodes of first and second field emission type microfabricated electron emitters are put at the same potential and two or more signal voltages are input to gate electrodes corresponding to these emitters. A NOR element so arranged that when a high potential input signal is input to either of the two lines, electron emission occurs from the emitters and the potential of said anodes is lowered, and a NAND element wherein the cathodes of the first and second field emission type microfabricated electron emitters are connected in series, two signal voltages are applied to the gate electrodes corresponding to the first and second emitter and the anode potential of the second emitter is lowered when the two input signals are high potential are employed.
摘要:
Further improvements in circuit-element performance of surface-acoustic wave devices are anticipated by being able to produce a diamond substrate on which is formed a Li(NbxTa1−x)O3 (wherein 0≦x≦1) thin film whose c-axis orientation is favorable and whose piezoelectric characteristics are satisfactory. A diamond substrate on which a highly c-axis oriented, piezoelectrically satisfactory Li(NbxTa1−x)O3 (wherein 0≦x≦1) thin film is formed can be obtained by using a laser ablation technique to form a Li(NbxTa1−x)O3 (wherein 0≦x≦1) thin film onto a (110)-oriented gas-phase synthesized polycrystalline diamond substrate, that is superficially mirror-surface processed. By utilizing a diamond substrate on which a piezoelectric-substance thin film is formed, surface-acoustic wave devices having high propagation speeds can be offered.
摘要翻译:表面声波器件的电路元件性能的进一步改进可以通过能够制造金刚石基片而形成Li(Nb x Ti a-x)O 3(其中0 <= x <= 1)薄膜,其中c- 轴方向是有利的,其压电特性令人满意。 通过使用激光烧蚀技术可以获得其上形成高度c轴取向的,压电令人满意的Li(Nb x Ti a-x)O 3(其中0 <= x <= 1))薄膜的金刚石基底,以形成Li(Nb x Ti a-x) -x)O3(其中0 <= x <= 1)薄膜到(110)取向的气相合成多晶金刚石基底上,其表面经镜面加工。 通过利用其上形成有压电物质薄膜的金刚石基板,可以提供具有高传播速度的表面声波装置。
摘要:
Provided are a substrate for a surface-acoustic-wave device and a surface-acoustic-wave device, in which an intermediate layer for controlling crystal characteristics of a piezoelectric layer does not easily separate from a diamond layer. A surface-acoustic-wave device substrate 20 and a surface-acoustic-wave device 10, according to the present invention, comprises a diamond layer 22, an intermediate layer 24 disposed on the diamond layer 22, and a piezoelectric layer 26 disposed on the intermediate layer 24, the piezoelectric layer 26 being made of LiNbO3 or LiTaO3, the intermediate layer 24 being made of AlN.
摘要:
The present invention relates to an electron emitting device having a structure for efficiently emitting electrons. The electron emitting device has a substrate comprised of an n-type diamond, and a pointed projection provided on the substrate. The projection comprises a base provided on the substrate side, and an electron emission portion provided on the base and emitting electrons from the tip thereof. The base is comprised of an n-type diamond. The electron emission portion is comprised of a p-type diamond. The length from the tip of the projection (electron emission portion) to the interface between the base and the electron emission portion is preferably 100 nm or less.
摘要:
The present invention relates to an electron emitting device having a structure for efficiently emitting electrons. The electron emitting device has a substrate comprised of an n-type diamond, and a pointed projection provided on the substrate. The projection comprises a base provided on the substrate side, and an electron emission portion provided on the base and emitting electrons from the tip thereof. The base is comprised of an n-type diamond. The electron emission portion is comprised of a p-type diamond. The length from the tip of the projection (electron emission portion) to the interface between the base and the electron emission portion is preferably 100 nm or less.
摘要:
An object of the present invention is to provide a cold-cathode electron source successfully achieving a high frequency and a high output, a microwave tube using it, and a production method thereof. In a cold-cathode electron source according to the present invention, emitters have a tip portion tapered at an aspect ratio R of not less than 4, and thus the capacitance between the emitters and a gate electrode is decreased by a degree of declination from the gate electrode. For this reason, the cold-cathode electron source is able to support an operation at a high frequency. A cathode material of the cold-cathode electron source is none of the conventional cathode materials such as tungsten and silicon, but is a diamond with a high melting point and a high thermal conductivity. For this reason, the emitters are unlikely to melt even at a high current density of an electric current flowing in the emitters, and thus the cold-cathode electron source is able to support an operation at a high output.
摘要:
The present invention relates to an electron emitting device having a structure for efficiently emitting electrons. The electron emitting device has a substrate comprised of an n-type diamond, and a pointed projection provided on the substrate. The projection comprises a base provided on the substrate side, and an electron emission portion provided on the base and emitting electrons from the tip thereof. The base is comprised of an n-type diamond. The electron emission portion is comprised of a p-type diamond. The length from the tip of the projection (electron emission portion) to the interface between the base and the electron emission portion is preferably 100 nm or less.