Цитата(pavor @ Aug 30 2008, 15:22)

Добрый День!
В русскоязычном мануале по PADS Layot (2003г) вскользь говорится, что есть жесткие и мягкие
правила трассировки, но нигде не говорится, какие правила мягкие, а какие жесткие.
Знающие люди, подскажите пожалуйста.
padslayout_user.pdf
страница 1694:
hard and soft rules
PADS Layout can pass hard or soft rules to PADS Router. A hard rule is one that PADS Router
cannot violate, which may lead to incomplete routes. A soft rule is one that is respected as hard
whenever possible, except when honoring the rule results in an incomplete trace.
Some same net rules are hard while other same net rules are soft. Hard same net rules are same
net SMD to via, and via to via. PADS Router cannot violate these rules. Soft rules are the first
corner rules: pad to corner, SMD to corner, and trace to corner. PADS Router violates these
rules only if all attempts to honor the rules fail.
Soft first corner rules apply only to round pads.
You can control whether a rule is hard or soft using the Pad Entry Quality check boxes on the
Routing tab of the Options dialog box in PADS Layout or the Options dialog box in PADS
Router.