Electronic Device And Electronic Circuit

Data of electronic device , PCB Design and electronic circuit

Web basicelectronic.blogspot.com

Sunday, October 08, 2006

Electronic Enclosures EMC shielding

Use Shielded Electronic Enclosures To Meet
EMC Standards

Proper selection of shielding options early in the design cycle
ensures electromagnetic compatibility without sacrificing other
Knowledge of shielding options and how to implement them
into initial product designs is vital to producing an electronic
packaging product that satisfies several important design
objectives. A properly applied shielding solution will meet
standards for electromagnetic compatibility (EMC), as well as
cost restrictions and the specific needs of high-power and
high-speed electronics.

Selecting magnetic shielding metals
High-permeability shielding material prevent interference from
driving sensitive circuits crazy

Shielding Strategies for Today's Electronic Enclosures
For as long as electronics have been around, enclosure engineers
have seen their role in the EMC design process as the clean-up
crew. Whatever design engineers could not solve with tricks of the
trade was left to them to handle. Unfortunately, this practice
continues, and an often-repeated process of trial and error to
contain electromagnetic interference shows up more often than
not in the testing phase.

Electronic Enclosures shielding
Effective EMI control prevents spurious signals from entering
or leaving an enclosure. Shields and filters are the predominant
techniques for controlling EMI.Shields can involve many
combinations of foils, conductive inks, paper, and adhesives.
For example, there are now shields that consist of silver ink
printed on 5-mil-thick polyester. After printing, a curing process
removes nonconductive solvents. The result is a homogeneous
shield that does not crack or delaminate when bent. The shield
can be mechanically fastened and grounded with solder tabs.
The cost is about the same as that for conventional laminated