Abstract
A kind of micro type sucking chip respectively stacks a substrate lamina, a flow channel lamina, and an air chamber lamina in turn from bottom to top. The flow channel lamina comprises two downward-penetrating holes, a sucking chamber channel disposed on the bottom, and two microfluidic channels disposed on the bottom and respectively connected to the downward-penetrating holes and the sucking chamber channel. The volume of the sucking chamber channel is larger than that of microfluidic channel. The flow channel lamina contains two valve members demarcating the top edge of mmicrofluidic channel and a sucking member demarcating the top edge of the sucking chamber channel. Only by driving the sucking member for deformation and reposition and operating in accordance with open and close actions of the micro fluidic channel, a high-efficient sucking type pumping action will be generated between the microfluidic channel and the sucking chamber, capable of reducing the air pressure for generating sucking type pumping action that can save power consumption and reduce residual liquid in flow channel and chamber channel.