Skorpios Technologies has received a follow-on investment to its Series B round of $19 million. The additional $2 million provided by T-Venture, Deutsche Telekom’s venture capital company, brings total investment in the round to $21 million.

The $21 million in Series B funding will be used to expand Skorpios Technologies’ infrastructure and complete the commercialization of its core technology, an advanced composite semiconductor on insulator technology, said the company.

Other investors in this round include Cottonwood Technology Fund and Sun Mountain Capital, among others.