SJSque

For what it's worth: I know that writing is not the same as speaking, and of course I don't know how long it took you to compose that comment, but your English is excellent.

Yeah, poor wording on my part. You're not going to be able to avoid 90-degree corners in any case when 45-degree (or any other non-axis-aligned) lines are not allowed in designs for many processes. What I should have said is that the metal line widths should take electromigration into account.

There are also fun things like optical proximity correction [1], but of course these things are mainly handled automatically by simulations/EDA tools now.

[1] https://en.wikipedia.org/wiki/Optical_proximity_correction

I don't know about PCB level, but on smaller scales you should avoid making right-angle turns in metal lines because of electromigration [1]. Energetic electrons flowing along the line will crash into the 'wall' at the turn, and will knock the atoms out of place a little bit. Over time, this will lead to 'erosion' of the corner.

[1] https://en.wikipedia.org/wiki/Electromigration

> who is paying $7/gallon for gas?

Today's price for standard gasoline here in the Netherlands is 1.83 EUR/litre, which is currently equivalent to 7.75 USD/gallon.

I think that I should take inspiration from some of these and add some new possibilities to my Idea Generator: http://www.stevesque.com/ideas