A current boost circuit acts as an \u201ceye opener\u201d for a digital bus line. The primary winding is adapted to have an input voltage coupled thereto. Then, after an n-type well as an n-type semiconductor region forming the other part of the photodiode is formed, a microwave is applied to the semiconductor substrate to heat the semiconductor substrate. The protein microparticles may be used to form powders, films, coatings, matrices, scaffolds and the like.