Hi,
You didn't let us know the place,where your looking for?anyways if your looking for the manufacturers in bangalore.
Hi-q is the best for mass production and for their quality.
Ats-ecad is again best,they have manufacturing unit in nanjangud towards mysore.
and last but not least its Micropack they also take mass production.
Above three pcb manufacturers are good,when we go for mass production and there are plenty of small manufacturers who do prototype boards.....
Agni futuristics...
Anand electronics.
Asscend...hope this will help you.
Regards
Ramesh