lˈiː sˈiːtʃˈɛn; bˈɔːɹn θˈɜːtiːn ˈɔːɡəst nˈaɪntiːnhˈʌndɹɪd fˈɪfti tˈuː ɪn ɡˈæŋʃən, kˈeɪəhsˌɪʌŋ, taɪwˈɑːn, ɪz ɐ tˌaɪwənˈiːz ˌɛndʒɪnˈɪɹ spˈɛʃəlˌaɪzɪŋ ɪn sˌɛmɪkəndˈʌktɚz, ɐ ɹᵻsˈɜːtʃɚɹ ɪn ɐmˈoːɹfəs sˈɪlɪkən ɪnðɪ ˈɜːli dɪvˈɛləpmənt ɪn taɪwˈɑːn, ænd ɐn ˌaɪˌiːˌiːˈiː fˈɛloʊ.
Lee Si-chen (; born 13 August 1952 in Gangshan, Kaohsiung, Taiwan), is a Taiwanese engineer specializing in semiconductors, a researcher in amorphous silicon in the early development in Taiwan, and an IEEE Fellow.