Greetings all
This string has reaffirmed the need to convert all of the electronic industry's measurement systems to metric. The use of weight to define thickness is a real mind bender to anyone outside the PCB manufacturing arena. There is way too much opportunity for confusion and error for a global business to survive without costly mistakes. (Remember the disastrous Mars mission of a few years back?)
The metrication of the inch by making the decimal inch laid the foundation of the mess we are in (at least in my opinion). Fortunately common sense (and economic necessity) is slowing coming to bare on the problem. For example, JEDEC will no longer register inch measurement based packaging.
The US actually signed on to employ and metric conventions in the 19th century, we just continue to move toward full use of the metric system inch by inch... ;-)
The metric system is so incredibly logical and simple. For us in the US to continue to pay homage to a linear measurement system based on the lengths of various body parts of long dead English kings is beyond reason.
Saying it will be too difficult is no defense. It is time to move out of the past. It will happen when we decide to make it so.
Just some thoughts...
Kind regards to all,
Joe
PS.100 micoinches is 2.54 microns, 1 mil is 25.4 microns, 1 inch is 25400 microns or 25.4mm