Container system

A container system, comprising:

• an outer base comprising a supporting structure, the outer base having a hollow body comprising an upper deck and a lower deck opposite the upper deck,
• wherein the lower deck is provided with a drain hole pattern that surrounds a geometric central region of the lower deck;
• an inner base configured to receive a workpiece, the inner base comprising:
• a first inner base treatment area corresponding to a workpiece accommodating region of the inner base,
• a second inner base treatment area arranged around the first inner base treatment area, and
• a workpiece supporting post arranged at a border region between the first treatment inner base area and the second inner base treatment area;
• an inner cover configured to match the inner base, the inner cover comprising:
• a first inner cover treatment area corresponding to a workpiece accommodating region of the inner cover,
• a second inner cover treatment area arranged around the first inner cover treatment area, and
• a hold down pin located on the first inner cover treatment area and surrounded by the second inner cover treatment area;
• and
• an outer cover configured to cover the inner cover, the outer cover comprising a pushing element configured to push the hold down pin at an exposed portion of the inner cover, such that the hold down pin presses the workpiece,
• wherein;
• the upper deck is configured to support the inner base,
• the hold down pin of the inner cover comprises a pressing part, the pressing part arranged through the inner cover and configured to press the workpiece and a pressure receiving surface that is arranged opposite the pressing part, a width of a projected area of an exposed portion of the pressure receiving surface being smaller than a width of a projected area of the pushing element,
• the first inner base treatment area comprises a hydrophilic treatment area, and
• the second inner base treatment area comprises a hydrophobic treatment area.