Sand blasting is a traditional mechanical processing technique which can be found in a mechanical workshop. Sand blasting has been used commonly for removing rusty surface, dry paints, or contaminants from a metal work piece. From the mid-1990s, sand blasting was used to machine large arrays of holes in glass panels for large-area flat panel display devices. Thousands of holes could be machined in the glass at once, which was highly efficient and low cost [ 1]. Sand blasting was introduced as a microstructuring technique in early 2000, with the name of powder blasting because much smaller particles were used [ 2]. The principle of power blasting micromachining is that when a powder particle indents the surface of a brittle material such as glass or silicon, it generates...