Patent ID: 7598653
Filing Date: 2009-10-06
Classification: G01N

Abstract:
1. A surface acoustic wave (SAW) bio-chip, comprising: a substrate, having property of piezoelectric material; an insulating layer, implemented on the substrate; a SAW generating region, implemented on the insulating layer, wherein a first SAW signal and a second SAW signal, being substantially identical, are generated from a same SAW element by interaction with the substrate and travel on the insulating layer; a first SAW transduction region, implemented on the insulating layer to receive the first SAW signal for producing a first electric signal; a second SAW transduction region, implemented on the insulating layer to receive the second SAW signal for producing a second electric signal; and a circuit unit, implemented on the substrate to receive the first electric signal and the second electric signal for processing the signals, wherein when the bio-chip is in operation, a reference sample is disposed over the insulating layer and at one of two routes of the first SAW signal and the second SAW signal, a testing sample is disposed over the insulating layer and at another one of the two routes of the first SAW signal and the second SAW signal, wherein the two routes are symmetric with respect to the SAW generating region.