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    • 3. 发明申请
    • METHOD OF MANUFACTURING A SEMICONDUCTOR DEVICE HAVING SMALL DIMENSIONS
    • 制造具有小尺寸的半导体器件的方法
    • WO1984004204A1
    • 1984-10-25
    • PCT/US1984000496
    • 1984-04-03
    • NCR CORPORATION
    • NCR CORPORATIONCHIAO, Samuel, Yue
    • H01L21/28
    • H01L29/6659H01L21/0337H01L21/321H01L21/76886H01L21/8236H01L29/78Y10S438/911
    • In a method for manufacturing a semiconductor device having small dimensions, a semiconductor substrate (10) is provided with a gate oxide layer (13), a heavily doped polysilicone electrode (14') and an oxide-nitride mask (15', 16'). After a light doping to form doped regions (21, 22) the substrate is subjected to thermal oxidation at a temperature in the range 700-750 degrees to form a relatively thick oxide layer (23) on the polysilicon gate (14') and a relatively oxide layer (26) on the adjacent substrate region. The oxide-nitride mask (15', 16') is then removed and the substrate subjected to further doping, the sidewall oxide layer (23) protecting the underlying substrate from further doping. The sidewall oxide layers (23) serve to prevent electrical shorts between individual tungsten layers (30, 31) provided on the polysilicon gate (14') and adjacent substrate. Sidewall oxide layers (24, 25) are also formed over polysilicon interconnect conductors (14'', 14''') and similarly prevent shorts between tungsten layers (32, 33) provided thereover.
    • 在具有小尺寸的半导体器件的制造方法中,半导体衬底(10)设置有栅极氧化层(13),重掺杂多晶硅电极(14')和氧化物氮化物掩模(15',16' )。 在轻掺杂以形成掺杂区域(21,22)之后,将衬底在700-750度的温度下进行热氧化,以在多晶硅栅极(14')上形成相对较厚的氧化物层(23),并且 相邻氧化物层(26)在相邻衬底区域上。 然后去除氧化物 - 氮化物掩模(15',16'),并且衬底经受进一步掺杂,侧壁氧化物层(23)保护下面的衬底不被进一步掺杂。 侧壁氧化物层(23)用于防止设置在多晶硅栅极(14')和相邻衬底之间的各个钨层(30,31)之间的电短路。 侧壁氧化物层(24,25)也形成在多晶硅互连导体(14“,14”)上,并且类似地防止在其上提供的钨层(32,33)之间的短路。