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    • 1. 发明授权
    • Method for forming a trench isolation structure in an integrated circuit
    • 在集成电路中形成沟槽隔离结构的方法
    • US6107143A
    • 2000-08-22
    • US150668
    • 1998-09-10
    • Tai-Su ParkHan-Sin LeeYu-Gyun Shin
    • Tai-Su ParkHan-Sin LeeYu-Gyun Shin
    • H01L21/76H01L21/762H01L27/08
    • H01L21/76232
    • A method is provided for forming a trench isolation structure in an integrated circuit that has a better reliability and an acceptable time-dependent dielectric breakdown over a greater range of production. The manufacturing method involves etching a trench in a semiconductor substrate, forming a sidewall-insulating layer along the sidewall and bottom of the trench, and depositing a trench-insulating layer in the trench and over the semiconductor substrate. The sidewall-insulating layer is formed to have a lower etch rate than the trench-insulating layer. As a result of this difference in etch rates, the sidewall-insulating layer is not damaged too much during wet etching processes that take place during the later part of manufacture. This makes the interface between the substrate, sidewall-insulating layer, and gate oxide more reliable. The difference in etching rate can be obtained by keeping an annealing process used in later processing below a threshold temperature so that the etch rate of the trench-isolating layer does fall too low. The difference in etching rate can also be obtained by using different materials for the sidewall-isolating layer and the trench-isolating layer, or by using multiple annealing processes.
    • 提供了一种用于在集成电路中形成沟槽隔离结构的方法,该集成电路在更大的生产范围内具有更好的可靠性和可接受的时间依赖介电击穿。 该制造方法包括蚀刻半导体衬底中的沟槽,沿着沟槽的侧壁和底部形成侧壁绝缘层,并且在沟槽中和半导体衬底上沉积沟槽绝缘层。 侧壁绝缘层形成为具有比沟槽绝缘层低的蚀刻速率。 由于这种蚀刻速率的差异,在制造后期部分的湿式蚀刻工艺期间,侧壁绝缘层不会受到太大损害。 这使得衬底,侧壁绝缘层和栅极氧化物之间的界面更可靠。 通过将后续处理中使用的退火处理保持在阈值温度以下,使得沟槽隔离层的蚀刻速率确实降低,可以获得蚀刻速率的差异。 也可以通过使用用于侧壁隔离层和沟槽隔离层的不同材料或通过使用多个退火工艺来获得蚀刻速率的差异。
    • 2. 发明授权
    • Method for forming a trench isolation in a semiconductor device
    • 在半导体器件中形成沟槽隔离的方法
    • US6083808A
    • 2000-07-04
    • US160094
    • 1998-09-25
    • Yu-Gyun ShinHan-Sin LeeTai-su ParkMoon-Han Park
    • Yu-Gyun ShinHan-Sin LeeTai-su ParkMoon-Han Park
    • H01L21/76H01L21/28H01L21/762
    • H01L21/76224Y10S148/05
    • A method for forming a trench isolation in a semiconductor device is provided in which a first heat treatment process is conducted on a thermal oxide layer previously formed in a trench at temperature range from about 1000.degree. C. to 1200.degree. C. for about 1 to 8 hours so as to remove defects in a semiconductor substrate and oxygen impurities within the semiconductor substrate resulting from a step of forming the trench in the semiconductor substrate. As a result, a subsequent second heat treatment process for densifying a trench filling material such as a CVD oxide layer can be performed at lower temperature of about 1000.degree. C. to 1050.degree. C., as compared with the temperature of the first annealing of the thermal oxide layer, thereby reducing distortions of the semiconductor substrate and reducing current leakages.
    • 提供了一种在半导体器件中形成沟槽隔离的方法,其中对预先形成在沟槽中的热氧化层进行第一热处理工艺,温度范围为约1000℃至1200℃,约1至 8小时,以便从半导体衬底中形成沟槽的步骤得到半导体衬底中的缺陷和半导体衬底内的氧杂质。 结果,与在第一次退火温度相比,可以在约1000℃至1050℃的较低温度下进行用于致密化CVD氧化物层的沟槽填充材料的随后的第二热处理工艺 热氧化层,从而减少半导体衬底的变形并减少电流泄漏。
    • 8. 发明授权
    • Multi-level semiconductor device and method of fabricating the same
    • 多级半导体器件及其制造方法
    • US07947540B2
    • 2011-05-24
    • US11703649
    • 2007-02-08
    • Han-Sin Lee
    • Han-Sin Lee
    • H01L21/00H01L21/84
    • H01L27/0688H01L21/8221H01L27/11H01L27/1108
    • A multi-level semiconductor device includes a first transistor on a semiconductor substrate, the first transistor including a first source/drain region, a semiconductor layer on the semiconductor substrate, a second transistor on the semiconductor layer, the second transistor including a second source/drain region in a first portion of the semiconductor layer, and a contact pattern extending from the first source/drain region and contacting a second portion of the semiconductor layer, wherein the second portion of the semiconductor layer has an impurity concentration that is greater than that of the second source/drain region.
    • 多级半导体器件包括半导体衬底上的第一晶体管,第一晶体管包括第一源/漏区,半导体衬底上的半导体层,半导体层上的第二晶体管,第二晶体管包括第二源/ 漏极区域,以及从所述第一源极/漏极区域延伸并接触所述半导体层的第二部分的接触图案,其中所述半导体层的所述第二部分具有大于所述半导体层的第二部分的杂质浓度 的第二源极/漏极区域。
    • 9. 发明授权
    • Trench isolation method
    • 沟槽隔离法
    • US06875670B2
    • 2005-04-05
    • US09775231
    • 2001-02-01
    • Han-Sin LeeMoon-Han Park
    • Han-Sin LeeMoon-Han Park
    • H01L21/76H01L21/762H01L21/31H01L21/469
    • H01L21/76224
    • In a trench isolation method, an etching mask pattern for forming a trench is formed on a semiconductor substrate. The substrate is etched to form a trench. An insulating layer is formed to fill the trench, and then a material layer is formed on the insulating layer. In this case, the material layer is made of material formed at a high temperature to density the insulating layer. The material layer and the insulating layer are planarly etched and the etching mask pattern is removed, so that a trench isolation layer is completed. Accordingly, although a densification process is avoided, it is possible to form a device isolation layer having a favorable surface profile.
    • 在沟槽隔离方法中,在半导体衬底上形成用于形成沟槽的蚀刻掩模图案。 蚀刻衬底以形成沟槽。 形成绝缘层以填充沟槽,然后在绝缘层上形成材料层。 在这种情况下,材料层由在高温下形成的材料制成,以密封绝缘层。 平面蚀刻材料层和绝缘层,去除蚀刻掩模图案,从而完成沟槽隔离层。 因此,尽管避免了致密化过程,但是可以形成具有良好表面轮廓的器件隔离层。