A highly air-permeable and water-resistance sheet according to the present invention includes a hydrophobic non-woven fabric layer having 100 mm H2O or more of water pressure resistance and a fine cellulose fiber layer layered on the hydrophobic non-woven fabric layer, and a water repellent layer is layered on either surface of the highly air-permeable and water-resistance sheet. The method also provides for forming and thermally annealing the pair of sourcedrain regions prior to forming a pair of lightly doped extension regions within the field effect transistor device. The assembly includes a tubular interfitting frame and a plurality of planar net panels. When the ring oscillator has a plurality of stages, the oscillation frequency control circuit includes one current source and a plurality of current mirrors for biasing the plurality of stages of the ring oscillator, respectively.