Multiple cleaning processes in a single tank
View Patent ↗Methods of cleaning workpieces are described. One method includes performing both a sonication cleaning operation and a rinse cleaning operation within a single cleaning tank. Another cleaning method described includes the use of cross flow of cleaning liquid within a cleaning tank while performing a rinse clean. The cleaning method includes the oscillation of one or more workpieces in the cleaning tank to perform the rinse clean.
1. A method, comprising:
submerging one or more workpieces in a rinse tank containing a cleaning liquid;
oscillating the one or more workpieces to remove at least a portion of the one or more workpieces from submersion in the cleaning liquid while generating a cross flow of the cleaning liquid in the rinse tank to generate tunnel flow shear cleaning of the one or more workpieces without sonicating the one or more workpieces.
2. The method of claim 1 , wherein the cross flow of the liquid is perpendicular to a direction of oscillating.
3. The method of claim 1 , wherein the cleaning liquid is flowed in planes parallel to the surfaces of the one or more workpieces.
4. The method of claim 1 , wherein the cleaning liquid comprises de-ionized water.
5. The method of claim 1 , wherein the cleaning liquid comprises a solvent.
6. The method of claim 1 , wherein the cross flow has a rate in an approximate range of 5 to 30 millimeters per second.
7. The method of claim 1 , wherein the one or more workpieces are oscillated at a rate in a range of 1,000 millimeters per minute (mm/min) to 10,000 mm/min.
8. The method of claim 1 , further comprising sonicating the one or more workpieces within the rinse tank.
9. The method of claim 1 , wherein the one or more workpieces are at least partially fabricated magnetic recording disks.