STANDARDS

An overview of: IEC : International Electro-technical Commission ISO : International Organization for Standardization UL : Underwriters Laboratories ATSM : American Society for Testing & Materials IPC : Institute for Interconnecting & Packaging Electronic Circuits MoD / DoD : Defence Standards.

Founded in 1906 with British scientist Lord Kelvin as its first president. Prepares and publishes international standards for all electrical, electronic and related technologies. The IEC embraces all electrotechnologies including electronics, magnetics and electromagnetics. electroacoustics, multimedia, telecommunication. energy production and distribution. terminology and symbols.

ISO was born from the union of two organizations in October The ISA (International Federation of the National Standardizing Associations), established in New York in The UNSCC (United Nations Standards Coordinating Committee), established in Delegates from 25 countries, meet at the Institute of Civil Engineers in London to create ISO. A new international organization. "to facilitate the international coordination and unification of industrial standards"

ISO's work program ranges from standards for traditional activities, such as agriculture and construction. Mechanical engineering, manufacturing and distribution. Transport, medical devices, information and communication technologies. Standards for good management practice and for services. Such as ISO9001 and ISO14001

Underwriters Laboratories® is an independent product safety certification organization that has been testing products and writing standards for safety since First International Office opens in London. UL Mission Statement To promote safe living and working environments by the application of safety science and hazard-based safety engineering. AND MAKE MONEY !!

ASTM was founded in 1898 by Charles Dudley based around the need for standards in the railroad industry for steel. In 1900 it expanded its interests into cement. Today they cover such diverse industries as safety in recreational aviation, to fiber optic cable installations in underground utilities, to homeland security and electrical equipment.

IPC was founded in 1957 as the Institute for Printed Circuits. As more electronics assembly companies became involved with the association, the name was changed to the Institute for Interconnecting and Packaging Electronic Circuits, and finally abbreviated to IPC. IPC represents all facets of the industry, including design, printed circuit board manufacturing and electronics assembly

Both the British MoD and the American DoD have in the past issued procurement specifications relating to Conformal Coatings. The trend in recent years on both sides of the big pond is for defence procurement to use national and international industrial standards.

So, we have all of theses standards How do we simulate or test for failure ? There are many individual company standards but most relate back to international standards.

PrefixNameWebsite ULUnderwriters Laboratories Incwww.ul.com IECInternational Electrical Commissionwww.iec.ch IPCThe Institute for Interconnecting and Packaging Electronic circuits MILUS department of defence DEF STANUK Ministry of Defencewww.dstan.mod.uk BSIBritish Standards Institutewww.bsi-global.com BSI ENBritish standards Institute (European) ASTMAmerican Society for Testing and Materialswww.astm.org ISOInternational organisation for standardisationwww.iso.org DINGerman institute for standardisationwww.din.de

Standards Some standards are specific to a property for example adhesion or flammability. Others include a range of properties, to test how well a conformal coating performs overall. The next few slides give a general comparison of 4 such standards

MIL-I C IPC-CC-830IEC 61086DEF STAN 59/47 Visual examination Thickness of film Tackiness Flexibility Q (resonance) Dissipation factor and permittivity Dielectric withstanding voltage Breakdown voltage Insulation resistance Flammability

MIL-I C IPC-CC- 830 IEC 61086DEF STAN 59/47 Thermal cycling Thermal aging Salt mist Insulation resistance after aging test Flexibility after aging test High altitude and temperature Thermal shock Insulation resistance after rapid temperature change Flexibility after rapid temperature change

MIL-I C IPC-CC-830IEC 61086DEF STAN 59/47 Humidity aging Moisture resistance Resistance to damp heat Hydrolytic stability Mould growth/fungal resistance Shelf life Emission of volatiles Resistance to solvent cleaning liquid Coating removal by solvent Resistance to freezer sprays

Standards These standards should be used as guidance only and the coating choice and tests should be made based on the specific application requirements. e.g. LED display – Salt fog, High moisture 85°C/85RH Avionics – Solvent resist, Outgassing, Moisture, Damp heat, thermal shock, Flammability…

damp heat, cyclic 6 cycles BMW GS corrosive gas test 21 days BMW GS thermal cycling test, 25 cycles T U –40 °C, T O 130 °C *) BMW GS damp heat, constant 21 days BMW GS thermal cycles BMW GS salt spray test BMW GS Coating adhesion test BMW GS Example: Customer selecting individual tests from existing standards.

Automotive approval tests Environmental stress (serial) Damp heat cycle - good protection performance. Total time 6 days

200 µm Typical failure on test board.

So, what happens in practice ? People still ask for coatings to MIL-I-46058c You can still list against this standard. UL is becoming more wide spread. IEC is being called up for harsh environments. IPC-CC-830 & IEC will sometimes be specified.

QPL Listing Qualified Products List There are only two standards that provide QPL’s MIL-I-46058c & UL All other standards you test against and then state “meets” the standard.

QPL matters. Because some competitors will claim they meet QPL standards without being listed HumiSeal have a range of products listed to both MIL-I-46058c and UL We continue to test and list to these standards.

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