Microfluidic chip

A microfluidic chip for collecting dielectric particles in a fluid sample to be tested, comprising:

• an insulating substrate defining an electrode-forming region which includes a first zone, a second zone spaced apart from said first zone, and an intermediate zone disposed between said first and second zones;
• a first interdigitated electrode including
• a first base electrode portion deposited on said first zone, and
• a plurality of first finger electrode portions which are deposited on said intermediate zone and displaced from each other, and each of which extends from said first base electrode portion toward said second zone to terminate at a first finger end;
• a second interdigitated electrode including a second base electrode portion deposited on said second zone and spaced apart from said first finger end of each of said first finger electrode portions by a first clearance, and
• a plurality of second finger electrode portions which are deposited on said intermediate zone, and which extend from said second base electrode portion toward said first zone to interdigitate with said first finger electrode portions of said first interdigitated electrode, each of said second finger electrode portions having a second finger end which is spaced apart from said first base electrode portion of said first interdigitated electrode by a second clearance;
• and
• a dielectric layer which is formed on said first and second interdigitated electrodes and which is made from a semiconductive inorganic material having a dielectric constant of from 3.7 F/m to 80 F/m.