According to Taiwan Patent Law, there are several circumstances under which Taiwan Intellectual Property Office may grant compulsory licensing of a patent. These grounds include: ①where a patented invention is to be exploited non-commercially for the enhancement of public interest; ②where a later invention or utility model patent cannot be exploited without infringing upon a prior invention or utility model patent, and where the later invention or utility model patent involves an important technical advancement of considerable economic significance in relation to the prior invention or utility model patent; or ③where a patentee has committed acts restricting competition or has committed unfair competition acts, for which a judgment has been made by a court of law or a decision has been rendered by the Fair Trade Commission of the Executive Yuan. On what grounds shall a request for compulsory licensing of a patent involving semiconductor technology be based?