A semiconductor package includes a flexible base film having a first surface opposing a second surface, a semiconductor chip mounted on the first surface of the base film, and a touch sensing structure including at least one conductive pattern adjacent to the semiconductor chip. The at least one conductive pattern is disposed through the base film and has a surface exposed at the second surface of the base film. A contact condition of the semiconductor package is determined based on detection of a conductive path between the at least one conductive pattern and a conductive frame or support surface of the semiconductor package. The contact condition provides an indication of heat dissipation that may be expected to occur for the chip during operation.