An electronic component has a portion adjacent to a surface of a base to which elements are mounted is immersed into a liquid resin or semi-solid resin such that an element surface of the base to which the elements are mounted is not immersed and in which the resin is then hardened. While a plurality of semiconductor modules are arranged in such a manner that main surface directions of these semiconductor modules are positioned in parallel to each other in a interval along a thickness direction thereof. A conveying roller is disposed opposite to the support frame relative to the pinch roller and in confrontation with the pinch roller. The post retinal operation pillow provides enhanced comfort to those individuals that are required to maintain a horizontal position of their head after an operation involving the retina or eye.