Patent ID: 8677818

Claim:
A flow sensing device comprising: a semiconductor chip having a chip cap and a chip base and a flow channel integrated therein, the flow channel formed between the chip base and the chip cap, and a sensing element positioned in said flow channel, the semiconductor chip having a first passage-opening in said chip base in fluid communication with said flow channel, and a second passage-opening in one of said chip base, said chip cap, and a space between said chip base and said chip cap in fluid communication with said flow channel; and a package base, having a top surface on a top side and a bottom surface on a bottom side, attached to said chip base of said semiconductor chip at said top surface, said package base having a first aperture in fluid communication with said first passage-opening, said first aperture extending through said package base from said top surface to said bottom surface, said first passage-opening being accessible from said bottom side of said package base and said second passage-opening of said semiconductor chip being accessible from said top side of said package base.