Micro deep drawing is a forming technique where metal sheet is deformed under mechanical pressure into a seamless three-dimensional shape.
A simple deep draw tool is based on 3 different parts. The Die, Punch and Blank holder. The die has the same dimensions as the outside of the desired product. The punch, which as an opposite shape, is used to press the material into the die. The blank holder is used to keep the material flat and prevent wrinkling.
The starting material also called the blank is placed on the die and clammed by the blank holder with a predefined force. This force is enough to prevent wrinkling, but still gives the material the possibility to flow inwards. The punch then presses the blank into the die, where at the end a product is formed.