TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The positive temperature coefficient thick-film circuit thermistor is made of positive temperature coefficient thick-film circuit thermistor paste. The rare earth thick-film resistor is made of rare earth dielectric paste and rare earth electrode paste. The rare earth dielectric paste contains solid phase component (C1) and organic solvent carrier (S1) in the weight ratio of 65:35-85:15. The solid phase component (C1) contains silicon dioxide-aluminum oxide-calcium oxide-boron trioxide-cobalt oxide-lanthanum oxide-rare earth oxide microcrystalline glass powder (M1), in which the content of silicon dioxide is 30-65 wt.%, aluminum oxide is 5-26 wt.%, calcium oxide is 15-38 wt.%, boron trioxide is 2-16 wt.%, lanthanum oxide is 3-15 wt.% and cobalt oxide 0.05-6 wt.%. The rare earth dielectric paste is prepared using nucleating agent (N1) containing 1-10 wt.% titanium oxide and 1-10 wt.% zirconium oxide. The organic solvent carrier (S1) contains 66-89 wt.% butyl carbitol, 5-15 wt.% acetyl tributyl citrate, 0.5-10 wt.% ethyl cellulose, 0.1-5 wt.% of hydrogenated castor oil, and 0.1- 5 wt.% lecithin. The rare earth oxide is chosen from lanthanum, cerium, neodymium, promethium, gadolinium, erbium, scandium, yttrium and terbium. The positive temperature coefficient thick-film circuit thermistor paste contains ruthenium dioxide-copper oxide-yttrium oxide composite powder, microcrystalline glass powder (M2) and organic carrier (S2). The weight ratio of ruthenium dioxide-copper oxide-yttrium oxide composite powder and organic carrier (S2) is 65-85:35-15. The weight ratio of ruthenium dioxide-copper oxide-yttrium oxide composite powder and microcrystalline glass powder (M2) is 75-55:25-45. The weight ratio of ruthenium dioxide, copper oxide and yttrium oxide in composite powder is 75-59:15-40.5:10-0.5. The microcrystalline glass powder (M2) is calcium oxide-silicon dioxide-aluminum oxide-boron trioxide-bismuth oxide-lanthanum oxide-rare earth oxide microcrystalline glass powder, in which content of silicon dioxide is 20-60 wt.%, aluminum oxide is 5-35 wt.%, calcium oxide 10-35 wt.%, bismuth oxide is 10-30 wt.%, boron oxide is 1-10 wt.% and lanthanum oxide is 0.3-8 wt.%. The positive temperature coefficient thick-film circuit thermistor paste is prepared using nucleating agent (N2) containing 1-8 wt.% titanium oxide and 1-10 wt.% zirconium oxide. The organic carrier (S2) contains 68-78 wt.% terpineol, 2-18 wt.% tributyl citrate, 0.4-9 wt.% ethyl cellulose, 0.4-9 wt.% nitrocellulose, 0.1-6 wt.% hydrogenated castor oil and 0.1-6 wt.% lecithin. The rare earth electrode paste contains solid-phase component (C3) and organic solvent carrier (S3) in weight ratio of 70-90:30-10. The solid-phase component (C3) contains silver-palladium-yttrium composite powder and microcrystalline glass powder (M3). The weight ratio of silver-palladium-yttrium composite powder and microcrystalline glass powder (M3) is 99.4-0.6:0.6-6. The weight ratio of silver, palladium and yttrium in composite powder is 0.6-10:99-82:0.4-8. The rare-earth electrode paste is prepared using nucleating agent containing 1-10 wt.% titanium oxide and 1-10 wt.% zirconium oxide. The organic solvent carrier (S3) contains 60-98 wt.% terpineol, 1-30 wt.% acetyl tributyl citrate, 2-10 wt.% ethyl cellulose, 1-5 wt.% nitrocellulose, 0.1-5 wt.% hydrogenated castor oil and 0.1-5 wt.% lecithin. The microcrystalline glass powder (M3) is silicon dioxide-aluminum oxide-calcium oxide-boron trioxide-bismuth oxide-lanthanum oxide-rare earth oxide microcrystalline glass powder, in which content of silicon dioxide is 20-60 wt.%, aluminum oxide is 5-35 wt.%, calcium oxide 10-35 wt.%, bismuth oxide is 10-30 wt.%, boron oxide is 1-15 wt.% and lanthanum oxide is 0.3-15 wt.%. Preferred Properties: The particle size of the silver-palladium-yttrium composite powder is 3 mu m. The particle size of the ruthenium dioxide-copper oxide-yttrium oxide composite powder is 0.30-1 mu m.    TECHNOLOGY FOCUS - METALLURGY - Preferred Composition: The metal substrate is ferrite-type stainless steel substrate, Cr15-type stainless steel substrate, 1Cr17-type stainless steel substrate or 00Cr18Mo2-type stainless steel substrate.