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    • 54. 发明授权
    • Plasma processing apparatus for large area ion irradiation
    • 用于大面积离子照射的等离子体处理装置
    • US4859908A
    • 1989-08-22
    • US100148
    • 1987-09-23
    • Akihisa YoshidaKentaro SetsuneTakashi Hirao
    • Akihisa YoshidaKentaro SetsuneTakashi Hirao
    • C30B31/22H01J37/32H01J27/02
    • H01J37/32091C30B31/22H01J37/32357H01J37/3266
    • A plasma processing apparatus performs various plasma processings of a substrate having a large area in a semiconductor element manufacturing process, by using highly excited plasma generated at a low pressure under the application of RF power and a magnetic field. In this plasma processing apparatus, a gas is introduced into a vacuum chamber to be used as an ion source, RF power is applied to two electrodes having respective surfaces opposite to each other through the gas to thereby generate the plasma in the vacuum chamber, and a magnetic field is applied to the plasma from a magnetic field source arranged at a predetermined position. The intensity of the applied magnetic field is set to be 1.5 times or more the magnetic field intensity which causes electron cyclotron resonance to occur at the frequency f of the applied RF power. Particularly, when the frequency f of the RF power is 13.56 MHz, the magnetic field intensity is selected to be in the range from 25 gausses to 35 gausses.
    • 等离子体处理装置通过使用在RF功率和磁场的应用下在低压下产生的高激发等离子体,在半导体元件制造工艺中执行具有大面积的衬底的各种等离子体处理。 在该等离子体处理装置中,将气体引入到真空室中以用作离子源,通过气体将两相电极的两个电极施加RF功率,从而在真空室中产生等离子体, 从布置在预定位置的磁场源向等离子体施加磁场。 所施加的磁场的强度被设定为在所施加的RF功率的频率f处发生电子回旋共振的磁场强度的1.5倍或更多。 特别地,当RF功率的频率f为13.56MHz时,磁场强度被选择在从25高斯到35高斯的范围内。
    • 59. 发明授权
    • Method of proton-enhanced diffusion for simultaneously forming
integrated circuit regions of varying depths
    • 用于同时形成不同深度的集成电路区域的质子增强扩散方法
    • US3982967A
    • 1976-09-28
    • US562370
    • 1975-03-26
    • San-Mei KuCharles A. PillusMichael R. PoponiakRobert O. Schwenker
    • San-Mei KuCharles A. PillusMichael R. PoponiakRobert O. Schwenker
    • C30B31/22H01L21/22H01L21/265H01L21/761H01L21/263
    • H01L21/263H01L21/26506
    • In integrated circuit fabrication, a method is provided for simultaneously forming two regions of the same conductivity-type such as the base and isolation regions. In one embodiment, an epitaxial layer of one conductivity-type is formed on a substrate of opposite conductivity-type, after which dopant ions of the opposite conductivity-type are introduced into the epitaxial surface areas which are to provide the base and isolation regions, and in addition, the isolation regions are bombarded with non-dopant ions having a maximum atomic number of two, e.g., hydrogen or helium ion while the base regions are appropriately masked and remain umbombarded, said bombardment is carried out at temperatures below 300.degree. C, preferably room temperature. The bombardment is preferably carried out so that the non-dopant ions are implanted primarily in regions below the isolation regions. Next, the wafer is heated at a temperature at a range of from 600.degree. - 900.degree. C which is substantially below normal drive-in diffusion temperatures for unbombarded doped regions. The heating to be maintained for a period sufficient to drive-in diffuse the bombarded isolation regions through the epitaxial layer into contact with the substrate but is insufficient to drive-in the unbombarded base regions to such a depth.
    • 在集成电路制造中,提供了一种用于同时形成相同导电类型的两个区域的方法,例如基极和隔离区域。 在一个实施例中,在相反导电型的衬底上形成一种导电类型的外延层,之后将相反导电类型的掺杂剂离子引入到要提供基极和隔离区域的外延表面区域中, 此外,隔离区域用最大原子数为2的非掺杂离子(例如氢或氦离子)进行轰击,同时基底区域被适当地掩蔽并且保持不变,所述轰击在低于300℃的温度下进行 ,优选室温。 优选进行轰击,使得非掺杂剂离子主要被注入在隔离区域下方的区域中。 接下来,将晶片在600-900℃的温度范围内加热,这对于未掺杂的掺杂区域基本上低于正常的驱动扩散温度。 保持加热持续足以驱动的时间段将被轰击的隔离区域通过外延层与基板接触,但是不足以将未轰炸的基极区域驱动到这样的深度。