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    • 5. 发明授权
    • Spincup with a wafer backside deposition reduction apparatus
    • 具有晶片背面沉积减少装置的加工
    • US5529626A
    • 1996-06-25
    • US327730
    • 1994-10-24
    • David R. Stewart
    • David R. Stewart
    • G03F7/16G03F7/30H01L21/00B05C13/00
    • H01L21/6715G03F7/162G03F7/3021
    • A spincup having a wafer backside deposition reduction apparatus is used to reduce wafer backside particle deposition of materials on a wafer during processing. The spincup includes an opening for accommodating a wafer supporting chuck and a particle guard which circumscribes the chuck. The particle guard contacts the base of the spincup and circumscribes the chuck. When the chuck supports a wafer, a wafer backside region is defined between the chuck and the particle guard. The spincup further includes an exhaust channel coupled to the wafer backside region to independently exhaust the wafer backside region. In one embodiment, the exhaust channel includes an exhaust port for connecting a vacuum generator to the exhaust channel and a shroud contacting a base of the spincup and the particle guard. In another embodiment, the exhaust channel includes exhaust tubes which replace the exhaust manifold shroud and exhaust port.
    • 使用具有晶片背面沉积还原装置的复合物在处理期间减少晶片背面颗粒在晶片上的沉积。 支撑件包括用于容纳晶片支撑卡盘的开口和限制卡盘的颗粒保护器。 颗粒防护装置与接头的底部接触并限制卡盘。 当卡盘支撑晶片时,晶片背面区域被限定在卡盘和粒子防护罩之间。 所述支柱还包括耦合到所述晶片背侧区域以排放所述晶片背侧区域的排气通道。 在一个实施例中,排气通道包括用于将真空发生器连接到排气通道的排气口和接触所述填料和颗粒防护件的底部的护罩。 在另一个实施例中,排气通道包括排气管,其替代排气歧管罩和排气口。
    • 6. 发明授权
    • Triple port cache memory
    • 三端口缓存内存
    • US5442770A
    • 1995-08-15
    • US76286
    • 1993-06-11
    • Peter G. Barratt
    • Peter G. Barratt
    • G06F12/08G06F12/00
    • G06F12/0853G06F12/0886
    • Cache memory input/output apparatus that allows transfer of a single data word and transfer of consecutive sequences of data words in a row of memory, using two independent serial ports and a random access port whose actions are controlled in part by a memory address signal. Data transferred by the serial ports are double buffered, each serial port having two independent registers; and the two registers associated with a serial port may be ganged together to transfer data sequences having word lengths from 16, or multiples thereof, up to arbitrary multiples of the length of a row of data words.
    • 高速缓冲存储器输入/输出装置,其允许使用两个独立的串行端口和随机存取端口,其一部分由存储器地址信号来控制单个数据字的传送和数据字的连续序列的数据字的传送。 由串口传输的数据是双缓冲的,每个串行端口有两个独立的寄存器; 并且与串行端口相关联的两个寄存器可以组合在一起以将具有从16或其倍数的字长度的数据序列传送到一行数据字的长度的任意倍数。
    • 10. 发明授权
    • PRML system with reduced complexity maximum likelihood detector
    • PRML系统具有降低的复杂度最大似然检测器
    • US5914989A
    • 1999-06-22
    • US800989
    • 1997-02-18
    • Hemant K. ThaparShih-Ming ShihKwok W. Yeung
    • Hemant K. ThaparShih-Ming ShihKwok W. Yeung
    • G11B20/14G11B20/10G11B20/18H03G3/20H03M13/23H03M13/39H04L1/00H03M13/12
    • G11B20/10009
    • A less complex maximum likelihood detector can be implemented in a partial response maximum likelihood (PRML) system without degrading system performance by saturating y values from a gain control loop to a smaller range before the y values are supplied to the maximum likelihood detector. A quantity "D" of a maximum likelihood detector operating in accordance with a partial response scheme has a particular relationship with respect to the maximum (ymax) of the y input values processed by the maximum likelihood detector. In some embodiments, y values from a gain control loop are saturated from a first larger range (defined by ymaxreal) to a second smaller range (defined by a value SAT) which is at least as great as the ymax of the ideal input signal (ymaxideal) for the partial response scheme. The saturated y values are provided to the maximum likelihood detector. The D of the maximum likelihood detector (given the partial response scheme and the smaller range of y values) is in a different "two to the power of an integer range" than the D would have been given the same partial response scheme but the larger range of y values.
    • 可以在部分响应最大似然(PRML)系统中实施不太复杂的最大似然检测器,而不会在将y值提供给最大似然检测器之前将y值从增益控制环饱和到更小的范围,而不降低系统性能。 根据部分响应方案操作的最大似然检测器的数量“D”与由最大似然检测器处理的y个输入值的最大值(ymax)具有特定的关系。 在一些实施例中,来自增益控制环路的y值从至少与理想输入信号的ymax一样大的第一较大范围(由ymaxreal定义)饱和到第二较小范围(由SAT定义) ymaxideal)用于部分响应方案。 饱和的y值被提供给最大似然检测器。 最大似然检测器(给定部分响应方案和y值的较小范围)的D与D给出相同的部分响应方案不同的“二到整数范围的功率”,但是较大 y值的范围。