Thanks for answers!
Now I learned about two aircraft factories bombed by Luftwaffe, that I didn't knew. Effectively, I imagine that OKW was not so interested in strategic bombing until the Battle of Britain ; and the Luftwaffe didn't had the four-engined bombers required for the task, being focused in tactical roles, as Stig said.
Anyway, if someone else knows about any other strategic targets hit by Luftwaffe in French Campaign 1940, it will be appreciated!