In order to fulfill our RoHS policy, we have implemented the RoHS System Action Plan as below:
Establish a RoHS Management Committee
Collect all the legal information about RoHS compliance
Establish RoHS Management System including policy, company operation procedures, work instruction and equivalent forms
Sort out all raw materials in relation to all RoHS control substances
Liaise with existing suppliers to ensure the raw materials supplied are in compliance with RoHS standard associated with testing report by third party
Establish an updated suppliers list whose products are in compliance with RoHS standard
Conduct tests for Production Line and Products
Divide all operation areas (including raw materials warehouse and finished good warehouse) into "RoHS zone" and "non-RoHS zone"
All procedures are implemented in a control manner as per RoHS documentations
Provide sufficient training related to RoHS regulations for all staffs
Measure the performance for Carven and suppliers on a periodic surveillance basis
Carven will arrange the site audit with customers and conduct random samples check by third-party laboratory
1/ What is RoHS?
RoHS is European Union (EU) Directive 2002/95/EC (effective on July 1, 2006) on the Restriction of Hazardous Substances in Electrical and Electronic Equipment.
2/ What hazardous substances are covered by RoHS?
RoHS restricts the use of lead (Pb), cadmium (Cd), mercury (Hg), Hexavalent chromium (Cr6+), polybrominated biphenyls (PBBs) and polybrominated diphenyl ethers (PBDEs).
3/ What are the benefits of the RoHS Directive?
The extraction of these raw materials and their eventual disposal can cause damage to both the environment in terms of pollution, as well as to human health from occupational exposure and exposure following disposal. The removal of these materials from production will reduce the health risks of exposure, particularly for children, the elderly and pregnant women.
4/ Relationships between Electronics Industry and RoHS
The EU's RoHS Directive imposes unprecedented regulatory restrictions on substances used in electronics. Manufacturers of all electronics products must comply with significant compliance requirements.
5/ What is RoHS's impact on you?
The RoHS Directive goes into effect on July 1, 2006. If selling products on the EU market, the products must be RoHS compliant by that date.

In other words any item of electrical or electronic equipment covered by the RoHS scope that is placed on the EU market from 1 July 2006 will have to comply, regardless of whether it is one of a line of products that existed before that date.

6/ Is there any material issue I should consider when designing for RoHS parts?
Typical RoHS assembly cycles usually run 30 C degrees higher than traditional assembly processes. Depending on the time spent for the thermal cycle, you may need to specify a laminate with a glass transition temperature (Tg) of 170 C degrees minimum, if warpage and seriously yellowing of the base laminate are found. If you have concerns about "Tin Whiskers", you have to specify a CAF (Conductive Anodic Filament) resistant material. For via and PTH reliability check, the CTE (Z-axis expansion) rating for the material has to be considered. Carven Engineering and PCB laminate suppliers can work collectively to be a valuable source of information when specifying materials for RoHS compliant boards.
7/ What are the pros and cons with different RoHS complaint finishes?
Immersion Silver
Low cost, simple process, uniform height, good for keypad contact
Cons: Sensitive to the corrosive environment.
Pb Free HASL
Low cost; good resistance for corrosion; long shelf life; simple and mature process
Cons: Non uniform coating, may contaminate solder bath due to different solder alloy combination.
Organic Surface Protectant (OSP)
Simple process, uniform finish, good solderability.
Cons: Limited shelf life; durability in multiple solder cycle assemblies; leaved bare copper on uncovered soldering area.
Electrogold plated
Long shelf life; simple process; durable surface
Cons: Very expensive; side edge copper leaved uncovered; different to control surface evenness
Flat surface; good for key contacts; suitable for PTF
Cons: Expensive; sensitive to humidity; solderability sensitive to gold thickness
8/ What have Carven done for RoHS?
We established documented and auditable systems in order to ensure that our products are free of RoHS-defined substances. We have taken the above Action plan towards the RoHS compliance.

We are able to demonstrate compliance by submitting technical documentation or other information to the enforcement authority on request.

For the more details for our compliance procedures, please read Annex D of the linked document from - RoHS Guidance notes February 2008 edition