We have tried to control water pH by a micro pH control system. We fabricate the micro chip system for pH control
constructed with a photoresist channel and integrated electrodes. In this system, the micro channels are set onto the
electrodes and electrical field is applied to the electrodes. As a result, the pH of de-ionized (DI) water is can be changed
from 7.0 to 7.4. In a macro system using a glass beaker and Al electrodes, the water pH can be changed from 7.3 to 8.6.
We believe that this study can contribute to bio-electronics, medical and agriculture fields.
MEMS (Micro Electro Mechanical systems) technology has been widely employed for micro device fabrication.
Polymer materials, such as photoresist resin, have been focused as permanent structural materials used for MEMS. It is
required that the permanent structural materials are durable to employ to micro device component. We demonstrate that
the mechanical strength of self-standing resist film is enhanced by forming hexagonal hole array. The destruction
strength of the resist film is analyzed by peel destruction test. As a result, the enhancement of the self-standing resist film
with patterning can be obtained.
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