Acid Resistant Conductive Paste Composition
The present disclosure is directed to a conductive paste composition. The conductive paste composition may be acid resistant. The conductive paste composition may be particularly suitable for plating applications, such as plating applications involving acidic solutions. The methods of the present disclosure are directed to making the aforementioned conductive paste composition and for making an article including a ceramic substrate and a fired conductive paste composition.
1 . A conductive paste composition comprising:
a metallic powder;
a borosilicate glass frit, the borosilicate glass frit comprising SiO 2 , B 2 O 3 , and WO 3 ;
a ruthenium-based powder; and
an organic medium, the organic medium comprising a solvent and a polymer or resin.
2 . The conductive paste composition of claim 1 , wherein the metallic powder comprises a copper powder.
3 . The conductive paste composition of claim 1 , wherein the metallic powder is present in the conductive paste composition in an amount of about 50 wt. % to about 95 wt. %.
4 . The conductive paste composition of claim 1 , wherein the conductive paste composition further comprises copper oxide, the copper oxide being present in the conductive paste composition from about 0.1 wt. % to about 15 wt. %.
5 . The conductive paste composition of claim 1 , wherein the glass frit is present in the conductive paste composition in an amount from about 0.5 wt. % to about 10 wt. %.
6 . The conductive paste composition of claim 1 , wherein the glass frit comprises WO 3 in an amount from about 5 wt. % to about 30 wt. %, based on the total weight of the glass frit.
7 . The conductive paste composition of claim 1 , wherein the glass frit comprises WO 3 in an amount from about 8 wt. % to about 20 wt. %, based on the total weight of the glass frit.
8 . The conductive paste composition of claim 1 , wherein the glass frit further comprises CaO in an amount from about 5 wt. % to about 35 wt. %, based on the total weight of the glass frit.
9 . The conductive paste composition of claim 1 , wherein the glass frit further comprises CaO in an amount from about 12 wt. % to about 30 wt. %, based on the total weight of the glass frit.
10 . The conductive paste composition of claim 1 , wherein the ruthenium-based powder is ruthenium oxide, the ruthenium oxide being present in the conductive paste composition in an amount from about 0.5 wt. % to about 5 wt. %.
11 . The conductive paste composition of claim 1 , wherein the organic medium is present in the conductive paste composition in an amount from about 3 wt. % to about 20 wt. %.
12 . The conductive paste composition of claim 1 , wherein the glass frit is substantially free of zinc oxide.
13 . The conductive paste composition of claim 1 , wherein the glass frit is substantially free of strontium oxide.
14 . The conductive paste composition of claim 1 , wherein the glass frit is substantially free of barium oxide.
15 . An article comprising:
a ceramic substrate; and
a fired conductive paste composition; the fired conductive paste composition being formed from a conductive paste composition, the conductive paste composition comprising:
a metallic powder;
a borosilicate glass frit, the borosilicate glass frit comprising SiO 2 , B 2 O 3 , and WO 3 ;
a ruthenium-based powder; and
an organic medium, the organic medium comprising a solvent and a polymer or resin.
16 . The article of claim 15 , wherein the ceramic substrate comprises aluminum nitride.
17 . The article of claim 15 , wherein the glass frit is present in the conductive paste composition in an amount from about 0.5 wt. % to about 10 wt. %.
18 . The article of claim 15 , wherein the glass frit comprises WO 3 in an amount from about 8 wt. % to about 20 wt. % based on the total weight of the glass frit, wherein the glass frit further comprises CaO, wherein the glass frit comprises CaO in an amount from about 12 wt. % to about 30 wt. % based on the total weight of the glass frit.
19 . A process for forming an article comprising:
applying a conductive paste composition to a ceramic substrate, the conductive paste composition comprising:
a metallic powder;
a borosilicate glass frit, the borosilicate glass frit comprising SiO 2 , B 2 O 3 , and WO 3 ;
a ruthenium-based powder;
an organic medium, the organic medium comprising a solvent and a polymer or resin; and
firing the conductive paste composition such that the conductive paste composition forms a fired conductive paste composition on the ceramic substrate.
20 . The process for forming an article of claim 19 , wherein the glass frit comprises WO 3 in an amount from about 8 wt. % to about 20 wt. %.