COMPOSITIONS AND METHODS FOR CREATING ELECTRONIC CIRCUITRY
申请人:LEE YUEH-LING
公开号:US20100009173A1
公开(公告)日:2010-01-14
The present invention is directed to non-lithographic patterning by laser (or similar-type energy beam) ablation, where the ablation system ultimately results in circuitry features that are relative free from debris induced over-plating defects (debris relating to the ablation process) and fully additive plating induced over-plating defects. Compositions of the invention include a circuit board precursor having an insulating substrate and a cover layer. The insulating substrate is made from a dielectric material and also a metal oxide activatable filler. The cover layer can be sacrificial or non-sacrificial and is used to remediate unwanted debris arising from the ablation process.
Synthesis of 5-Amino-4-aminocarbonyl-1-hydroxyimidazole and its Conversion to Novel Acyclic Analogues of AICA Riboside
作者:Michael R. Harnden、L. John Jennings、Colin M. D. Mckie、Ann Parkin
DOI:10.1055/s-1990-27045
日期:——
A new, improved procedure for the preparation of 5-amino-4- aminocarbonyl-1-hydroxyimidazole from N′-benzyloxy-N,N- dimethylformamidine and 2-amino-2-cyanoacetamide is described. O-Alkylation of this 1-hydroxyimidazole with appropriately functionalised alkyl halides or sulphonates provides an efficient route to acyclic imidazole nucleoside analogues.