The aim of the test is to classify the materials according to their flammability. UL 94 consists of two test types: vertical and horizontal. It was introduced by Underwriters Laboratories.
Classifies and rates the degree of protection provided against the intrusion of solid objects (including body parts like hands and fingers), dust, accidental contact, and water in mechanical casings and with electrical enclosures.
SMD (Surface Mounted Device) – device surface mounted. It is an identification of electronic components suitable for surface mounting.
PCB (Printed Circuit Board) – made from dielectrical material covered with traces and soldering/contact points of conductive material (copper Cu).
Stencils usually made from metal or other products with holes, which are used for applying solder paste on printed circuit boards in SMD assembly process.
Properly prepared assembly documentation enable, and therefore speeds up offer preparation, and implementation of a production order. That is why we compile a guide, wich help You to prepare correct and clear documentation of production.
While designing printed circuit boards certain rules have to be followed. A board which is designed according to these rules will be not only technologically feasible but also assembly of components will be much easier.
From CAD program settings in generating gerber files and drilling area, depends quality of board perfomance and SMD assembly.