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    • 5. 发明专利
    • Heat sink for semiconductor device
    • 用于半导体器件的散热器
    • JPS5975650A
    • 1984-04-28
    • JP18560482
    • 1982-10-22
    • Nec Corp
    • SUZUKI KATSUMI
    • H01L23/373
    • H01L23/3738H01L2924/0002H01L2924/00
    • PURPOSE:To improve the radiation efficiency of the semiconductor device, and to mount even an ultra-high density integrated circuit easily by forming a square pole-shaped projection to one side surface of an Si or Ge single crystalline substrate and fixing a surface on the reverse side onto the back of a semiconductor substrate. CONSTITUTION:Silicon nitride films 12 are deposited on both surfaces of the silicon single crystalline substrate 11 through a CVD method, a latticed resist-pattern 13 at desired intervals is formed on either one surface of the films 12 by using optical exposure technique, etc., and another surface is coated with a resist 14. The silicon nitride film 12 is etched and removed through plasma-etching using a gas such as, CF4 gas, etc. while using the resists 13, 14 as protective films to form a desired silicon nitride film pattern 12', and the resists 13, 14 are removed. The substrate 11 is etched and removed selectively up to desired depth in an anisotropic etching liquid while using the silicon nitride films 12, and 12' as protective films to form the heat sink 11'. When the heat sink 11' and the semiconductor substrate 18 are unified, heat generated in a circuit formed on the substrate 18 is discharged effectively into a coolant such as air from the projecting sections of the surface of the heat sink 11'.
    • 目的:为了提高半导体器件的辐射效率,并且通过在Si或Ge单晶衬底的一个侧表面上形成正方形的柱状突起并且将表面固定在 反面到半导体衬底的背面。 构成:通过CVD法将硅氮化物膜12沉积在硅单晶衬底11的两个表面上,通过使用光学曝光技术等,在膜12的任一个表面上以期望的间隔形成网格化抗蚀剂图案13。 ,另一面用抗蚀剂14涂覆。使用诸如CF 4气体等的气体,通过等离子体蚀刻来蚀刻和去除氮化硅膜12,同时使用抗蚀剂13,14作为保护膜以形成所需的硅 氮化物膜图案12'和抗蚀剂13,14被去除。 在使用氮化硅膜12和12'作为保护膜以形成散热器11'的同时,在各向异性蚀刻液中选择性地蚀刻和去除衬底11直至所需的深度。 当散热器11'和半导体基板18一体化时,在基板18上形成的电路中产生的热量可从散热器11'的表面的突出部分有效地排出到诸如空气的冷却剂中。