Thin film semiconductor device having arrayed configuration of semiconductor crystals and a method for producing it
    33.
    发明授权
    Thin film semiconductor device having arrayed configuration of semiconductor crystals and a method for producing it 失效
    具有半导体晶体排列构造的薄膜半导体器件及其制造方法

    公开(公告)号:US06953714B2

    公开(公告)日:2005-10-11

    申请号:US10293939

    申请日:2002-11-14

    摘要: A method for producing a thin film semiconductor device is described. In the method, a thin film layer of non-single-crystalline semiconductor, which is deposited on a base layer of glass, is processed to an island-shaped thin film layer at the time prior to the layer irradiation step. The laser irradiation to the thin film layer of non-single-crystalline semiconductor is carried out after forming an insulation film layer and a gate electrode over the island-shaped thin film layer, by using the gate electrode as the irradiation mask, whereby the center area of the island-shaped thin film layer masked by the gate electrode is crystallized, and simultaneously, the both side areas thereof which is not masked by the gate electrode are annealed. Next, a source electrode and a drain electrode is formed in the annealed areas. The implantation of impurity ion may be carried out either before or after the laser irradiation. By the above order of steps, it becomes possible to obtain a thin film semiconductor device which has small numbers of crystals and less variance of grain size of crystals for each unit of electric circuit, compared with a device produced by the conventional process. Further, the process makes it possible to be even the boundary surface between the crystallized layer and the insulation layer in a device.

    摘要翻译: 对薄膜半导体器件的制造方法进行说明。 在该方法中,沉积在玻璃基底层上的非单晶半导体薄膜层在层照射步骤之前被处理成岛形薄膜层。 通过使用栅电极作为照射掩模,在岛状薄膜层上形成绝缘膜层和栅电极之后,对非单晶半导体的薄膜层进行激光照射,由此中心 由栅电极掩蔽的岛状薄膜层的区域被结晶化,同时,未被栅极电极掩蔽的两侧区域退火。 接下来,在退火区域中形成源电极和漏电极。 杂质离子的注入可以在激光照射之前或之后进行。 通过上述步骤,与通过常规方法制造的器件相比,可以获得每个电路单元具有少量晶体和较小晶体粒径变化的薄膜半导体器件。 此外,该方法使得可以在器件中甚至结晶层和绝缘层之间的边界面。