Logo Design - Best practice to avoid shape anti-aliasing borders

what's best way avoid anti-aliasing borders can form in following situation.

 

final goal demo shape (imported ps show transparency)

 

note white section can't cut out of maroon shape - needs solid white when using on transparent background.

 

now illustrator (as far i'm aware there 2 different ways create above.

 

a) clipping mask

b) use pathfinder crop white shape , position in circle.

 

both these methods when used both end thin border caused anti-aliasing looks this:

 

what's best approach ensure doesn't happen when converted raster format (or viewed @ different sizes etc when exported pdf).

 

i've experimented cutting scissors tool @ either side of white shape seem work, i'm wondering if there better way this...?

cheers!

note white section can't cut out of maroon shape - needs solid white when using on transparent background.

sure can. ignoring layer order. nothing stops putting white fill beneath other object.

 

mylenium

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