During injection molding of a plastic product having a base wall and a sidewall, alignment of the mold parts that shape the mold cavity is maintained by conducting injected plastic material through a sequence of variable-opening throttles in a base-wall-section flow guide of the mold cavity. An account management service enables femtocell account creation, and registration thereof. On the glass substrate 10 after the formation of the channel region 18 is formed, a wall made of a polyimide film 20 surrounding the peripheries of the regions for forming the sourcedrain regions 22, the color filter 23, the pixel electrode 24 and the source line 26.