A carpenters pencil sharpener having a body member having a T-shaped opening in its front wall. Additionally, the microwave extraction method involves the steps of applying reduced pressure in the enclosure during the microwave radiation stage and heating the enclosure during at least most of the microwave radiation stage to compensate for the temperature drop resulting from water evaporation from the biological material. The chip scale semiconductor device also contains and an interconnect structure that also serves as a land for the package. Further, a method is adopted comprising a first step of reliably taking in a coarse in-focus point and a second step of detecting the in-focus point with a high degree of precision.