MASKLESS SELECTIVE RETENTION OF A CAP UPON A CONDUCTOR FROM A NONCONDUCTIVE CAPPING LAYER

    公开(公告)号:US20180082965A1

    公开(公告)日:2018-03-22

    申请号:US15813342

    申请日:2017-11-15

    IPC分类号: H01L23/00

    摘要: A semiconductor structure includes an electrically conductive structure formed upon an uppermost organic layer of a semiconductor substrate. A capping layer is formed upon the uppermost organic layer covering the electrically conductive structure. A maskless selective removal lasering technique ejects portions of the capping layer while retaining the portion of the capping layer covering the electrically conductive structure. Portions of the capping layer are ejected from the uppermost organic layer by a shockwave as a result of the laser beam vaporizing the uppermost organic layer of the semiconductor substrate. Portions of the capping layer contacting the electrically conductive structure are retained by the conductive structure dissipating heat from the laser that would otherwise vaporize the uppermost organic layer of the semiconductor substrate.