Method for producing porous liquid crystal polymer

The manufacturing method includes a first step, a second step, and a third step. In the first step, a liquid crystal polymer is sheeted to form a nonporous sheet (3). In the second step, the non-porous sheet (3) is impregnated with a supercritical fluid (15). In the third step, either the pressure or the temperature of the atmosphere of the non-porous sheet (3) impregnated with the supercritical fluid (15) is lowered so as to be lower than the critical point of the supercritical fluid (15), thereby foaming the non-porous sheet (3) and producing the porous liquid crystal polymer sheet (1). 制造方法具备第1工序、第2工序和第3工序。在第1工序中，对液晶聚合物进行片材化从而形成无孔质片材(3)。在第2工序中，使超临界流体15浸渗至无孔质片材(3)。在第3工序中，使浸渗有超临界流体(15)的无孔质片材3的气氛的压力及温度中的任一者下降以使其低于超临界流体(3)的临界点，由此使无孔质片材3发泡，制造多孔质液晶聚合物片材(1)。