Issue link: https://iconnect007.uberflip.com/i/1236528
72 PCB007 MAGAZINE I APRIL 2020 This LoPCB proved to be very successful. The optical and electrochemical electrodes (sensors) provided data equal to those measured in laborato- ry test and in some cases, even more sensitivity—plus, there were no fluidic leaking. Figure 11 shows the three lay- ers of this cartridge before and after lamination. Also shown is the cartridge prepared to accept the medical fluids and human test sample. Other research- ers on LoPCB have performed similar experiments and de- signed similar modules. Figure 12 illustrates a portable micro- fluidic diluter with a variable and actively controlled dilu- tion ratio suitable for PoC im- plementations. It is fabricated entirely using the developed Figure 10: Fully integrated PCB cartridge with microfluidics, reaction chambers, and sensors [5] . Figure 11: The three layers of the ELISA LoPCB cartridge before lamination, the finished PCB multilayer, and the LoPCB prepared for testing with biofluids and the human serum [1] .