Circuit board for collecting body fluid and biosensor
A biosensor and circuit substrate technology, applied in the fields of sensors, applications, medical science, etc., can solve the problems of complicated measurement preparation work and rising operating costs, and achieve the effects of simple structure, simple measurement, and easy replacement
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[0124] manufacture figure 1 Circuit board for blood collection shown
[0125] First, prepare an elongated sheet-shaped metal substrate made of SUS430 with a thickness of 50 μm (see Figure 5 (a)).
[0126] Next, a varnish of a photosensitive polyimide resin precursor (photosensitive polyamic acid resin) is applied on the surface of the metal substrate, heated and dried to form a cover film, and then exposed and developed to form a cover film as pattern. Then, an insulating base layer with a thickness of 10 μm was formed in the above pattern by heating to 400° C. in a nitrogen atmosphere (see Figure 5 (b)).
[0127] Next, a metal thin film made of a chromium thin film and a metal thin film made of a copper thin film are sequentially formed on the surface of the insulating base layer by means of sputtering. Then, a dry film resist is laminated on the surface of the metal thin film, and exposure and development are performed to form a plating resist layer in a pattern. T...
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