Method for providing a magnetic recording transducer using a chemical buffer
View Patent ↗A method for fabricating a magnetic recording transducer is described. The magnetic recording transducer has an underlayer and at least one layer on the underlayer. The layer(s) are capable of including an aperture that exposes a portion of the underlayer. The method includes providing a neutralized aqueous solution having a chemical buffer therein. The chemical buffer forms a nonionic full film corrosion inhibitor. The method also includes exposing a portion of the magnetic recording transducer including the layer(s) to the neutralized aqueous solution including the chemical buffer. In one aspect this exposure occurs through a chemical mechanical planarization.
1. A method for fabricating a magnetic recording transducer having an underlayer, at least one layer on the underlayer, and a structure under the underlayer, the at least one layer capable of including an aperture that exposes a portion of the underlayer, the method comprising:
providing a neutralized aqueous solution having a chemical buffer therein, the chemical buffer for forming a nonionic full film corrosion inhibitor that inhibits removal of the portion of the underlayer exposed by the aperture by forming the nonionic full film corrosion inhibitor on at least the aperture; and
exposing a portion of the magnetic recording transducer including the at least one layer to the neutralized aqueous solution including the chemical buffer, corrosion of the structure being inhibited by inhibition of removal of the portion of the underlayer by the nonionic full film corrosion inhibitor.
2. The method of claim 1 wherein the step of providing the neutralized aqueous solution including the chemical buffer therein is performed by introducing at least one additive to an aqueous solution.
3. The method of claim 2 wherein the at least one additive includes at least one of at least one amine and at least one polyoxyethylated nonionic surfactant.
4. The method of claim 3 wherein the at least one polyoxyethylated surfactant includes at least one of alkylphenols having a first hydrophobic tail portion including less than fifteen C—C chains and fatty alcohol ethoxylates having a second hydrophobic tail portion including less than the fifteen C—C chains.
5. The method of claim 3 wherein the at least one amine includes at least one quaternary ammonium salt.
6. The method of claim 3 wherein the at least one additive has a concentration in a semi-micelle range.