The invention discloses a high-temperature sheet-type 
tantalum capacitor and a manufacturing method of the high-temperature sheet-type 
tantalum capacitor. The manufacturing method of the high-temperature sheet-type 
tantalum capacitor comprises the steps that an 
anode is designed, namely, the weight of tantalum 
powder is calculated according to formation 
voltage which is 2-6 times of the nominal 
voltage, and a porous matrix 
anode tantalum core is formed through 
sintering; 
dielectric film is formed, namely, 
aqueous solution with 
electrolyte being 
boric acid or 
nitric acid or 
phosphoric acid or 
ammonium dihydrogen 
phosphate or 
ethylene glycol is selected as formation solution, and 
tantalum pentoxide dielectric film which is uniform in thickness and good in uniformity is formed on the surface of the 
anode tantalum core; a 
manganese dioxide 
cathode is manufactured, namely, the anode tantalum core is put into manganous 
nitrate with different proportions, repeated operation is conducted, and a 
manganese dioxide 
cathode layer is formed; the high-temperature sheet-type 
tantalum capacitor is assembled. The high-temperature sheet-type 
tantalum capacitor can 
resist high temperature of 200 DEG C, has good high-temperature-resisting capacity, and is small in size, good and stable in performance, and capable of being widely applied to the fields of power supply control parts of 
airplane noses or guided missiles or the like and the fields of 
petroleum drilling electronic circuits and the like.