The LPI solder mask is simply an epoxy based material that offers a good level of durability. It is very difficult to remove this soldermask after curing. If you wish to understand and acquire more knowledge about LPI PCB (liquid photo-imageable(LPI)soldermask, you can read further. ...
The present invention provides a photopolymerizable composition useful as a liquid photoimageable solder mask comprising (a) a reaction product obtained by reacting epoxy resin A containing at least two terminated epoxy groups with 0.8 to 1.2 mol, per 1 epoxy equivalent of epoxy resin A, of an ...
the lower transparent glass substrate SUB1and the upper transparent glass substrate SUB2are overlapped, the liquid crystal LC is filled through the opening portion INJ of the seal member SL, the fill-in inlet INJ is closed by epoxy resin or the like, and the upper and the lower substrates ...
Preparation of Carboxylated Epoxy Acrylates and Their Application in Photoimageable Solder Resist Ink THPAn and HHPAn were the appropriate carboxylic anhydride for the preparation of the alkaline developable photosensitive solder resist.YANG Jian WenInstitute ... JW Yang,XW Luo,ZH Zeng,... - 《Chin...
3. Liquid Photoimagible Solder Mask, LPSM liquid photosensitive solder resist green paint It is a kind of solder resist green paint used for the board surface. Due to the increasing number of thin-line boards, the early screen printing baking type epoxy resin green paint can no longer be ...
And this is the other side, which works ok. Couple of days later I'm back with a vengance. Came up with a better way to splice thin wires. I cut a tiny perfboard, added flux to help heat transfer around the tiny wires, and used that as a support to join the wires while...
a soldermask to a circuit board, a conditioning liquid such as a monomer, plasticizer or liquid such as disclosed in U.S. Pat. No. 4,069,076 may be applied to the substrate to eliminate bubble or air entrapment at the relief surface during lamination. Alternatively, when the photosensitive...
The present invention provides a photopolymerizable composition useful as a liquid photoimageable solder mask comprising (a) a reaction product obtained by reacting epoxy resin A containing at least two terminated epoxy groups with 0.8 to 1.2 mol, per 1 epoxy equivalent of epoxy resin A, of an ...
Solder mask composition is cross-linked acrylic and epoxy matrix composition. 当应用于电路板时,焊接掩模组合物有很高精确度的线性分辨率,优良的耐焊接性和耐溶剂性,甚至用强酸溶剂也满足ⅠPC的H类涂层的功能要求,且可用碱性水溶液显影. When applied to the circuit board, solder mask composition has a high...
After having formed thus the grooves for the liquid pathways and liquid chamber with the cured dry film, a flat plate comprising soda glass provided with a through-hole which becomes the covering over the groove formed was applied with an epoxy type resin adhesive to a thickness of 3 μm by...