An active matrix liquid crystal panel comprises an active matrix substrate, on which a plurality of parallel signal lines and a plurality of parallel scanning lines are arranged for forming a matrix of pixels. The sourcedrain regions 170 have a channel region 175 located between them. The fastener is in the form of a plastic ring with a plurality of tabs projecting from a bottom rim thereof. The sound damping patch may include one or more forming features located near complex stress regions. The processing device may also consider a number of factors.