Process for preparing (3-oxo-2,3-dihydro-1H-isoindol-1-yl) acetylguanidine derivatives

• Main Authors: HANNA REDA, SCHUBERT GERRIT, KEIL JOHANNES, WU XIAO-DONG, GOURAUD YVES, KLEEMANN HEINZ-WERNER, RIEKE-ZAPP JOERG, HUANG BAO-GUO
• Format: Patent
• Language: English
• Published: 09.06.2005
• Edition: 7
• Subjects: CHEMISTRY; HETEROCYCLIC COMPOUNDS; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE; METALLURGY; ORGANIC CHEMISTRY; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES

A method and apparatus for preventing board warpage during the application and curing or drying of liquid epoxies, or the like, on printed circuit boards using a clamping fixture assembly, which includes at least one clamping fixture support and at least one clamping fixture overlay. If desired, a plurality of printed circuit boards may be processed using an appropriate clamping fixture assembly. Furthermore, the clamping fixture may be constructed so a slight bow or curvature thereof can counter either a convex or concave bow or curvature of the printed circuit board. In the method, at least one printed circuit board is mounted to a clamping fixture support whereby a clamping fixture overlay is placed on top of the first printed circuit board.