Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Photo-mask for manufacture of two-layer tab










Image Number 3 for United States Patent #5284725.

Disclosed are photo-masks for use in two exposure steps to be effected for forming a ground metal layer on the back surface of a substrate in manufacture of a two-layer: TAB in which a metal layer is formed on one surface or both surfaces of an insulating resin substrate without an adhesive, determined metal leads are formed on the top surface of the substrate, via holes are formed on the determined positions of the substrate, a ground metal layer is formed on the back surface of the substrate, and a part of the leads as formed on the top surface of the substrate are electrically connected with the ground metal layer as formed on the back surface of the same via the via holes; the photo-masks being characterized in that the photo-mask to be used in the first exposure step for forming the via holes to the back surface of the substrate is provided with alignment marks in the determined plural positions thereof and that the photo-mask to be used in the second exposure step for forming the ground metal layer on the back surface of the substrate is provided with alignment marks in the positions corresponding to the positions of the alignment marks made in the first photomask.








 
 
  Recently Added Patents
Catalysts and process for producing aldehydes
Crowd control barrier II
Hand sign
Coated article and method for making the same
Pallet
Method and apparatus for linking a web browser link to a promotional offer
Node and wireless sensor network comprising the node
  Randomly Featured Patents
Athletic training sled apparatus
Time delay device
Multi-channel device having storage modules in a loop configuration with main control unit for controlling data rates and modifying data selectively and independently therein
Method and apparatus for internet access which bypass local central end office using digital loop carrier and permanent signal treatment procedures
Device for testing trailer couplings under loading conditions resembling those occurring in use, preferably with inclusion of the construction for fixing the trailer coupling
Simplified umbrella without externally-extended spring positioning means
Preparation and uses of stable, bound stationary phases
Reinforced-concrete column in the soil pit
Stepped horn with dielectric loading
Lighting apparatus