“Wacker”

Data:

• Albert Nestler
• January 1968 (based on the faint 168 marks)
• Labeled “Wacker”

Question:

1. What is its use?
   Around 1968 Wacker Chemitronic Gesellschaft für Elektronik-Grundstoffe mbH made hyperpure polysilicon for the electronics industry. Andries de Man
   Scales RN and RP (Ohm cm) refer to n- and p-doped silicon. Dale Rupert
   *M scales refer to metric, *I scales to imperial units
   The DM scale (mm) is related to the AM scale (mm²) as AM = π(DM/2)², so diameter vs area of a circle. Andreas Poschinger
   Why is the WM scale (Gramm) equal to the LM scale (mm)?
   Probably used in-house by Wacker engineers and not to be issued to customers. Bob de Cesaris, Karl Kleine
   Check if silicon wafer sizes at the time (late 1960's) match the scale ranges. Bob de Cesaris