IPC-4204A Provides Guidance on High Speeds and Fine Lines

Jun 01, 2012

 As chip speeds skyrocket and system sizes diminish, designers and manufacturers face new and complex challenges. To help them address these challenges and ensure that products meet performance and reliability requirements, IPC – Association Connecting Electronics Industries® released the A revision of IPC-4204, Flexible Metal-Clad Dielectrics for Use in Fabrication of Flexible Printed Circuitry. The updated standard now details materials that let designers and manufacturers move to far higher frequencies.

We need to know that each material will still work at high frequencies, that there won’t be any crosstalk or any other problems,” said Clark Webster, an application engineer at All Flex LLC and chair of the IPC flexible circuits base materials subcommittee that worked on the revision. Along with enabling the reach of higher frequencies, the revised standard focuses on improved dimensional stability, particularly for adhesiveless assemblies. Enhanced dimensional stability is very important in environments like cell phones, where flex circuits must match up with traces on glass that can be smaller than 12 microns, Webster noted.

In the past, designers knew the dimensional stability and the shrinkage and other factors that impacted stability, and they could modify the artwork to meet changing parameters,” Webster explained. “It’s a lot easier to meet today’s requirements if you have better stability and don’t have to guess how much the material will change during processing.”

IPC-4204A addresses the basic aspects of flexible circuit board design and also includes more focused information. Specification sheets at the end of the document provide users with information for classes of materials, including polyimides, liquid crystal polymers and polyesters. “Within these families of materials, people can see the requirements, parameters and test methodologies. Specification sheets make it easy for people to see the best material for their applications,” said Webster.

Now that IPC-4204A is available to industry, committee members are moving on to tackle another flex technology, revising IPC-4203, Adhesive Coated Dielectric Films for Use as Cover Sheets for Flexible Printed Circuitry and Flexible Adhesive Bonding Films. IPC-4203 is often used by flex manufacturers in conjunction with IPC-4204A. IPC-4203A is expected to be released this fall.

IPC-4204A is available for purchase by IPC members for $36. The standard industry price is $72. For more information or to purchase the standard, visit www.ipc.org/4204.


IPC (www.IPC.org) is a global industry association based in Bannockburn, Ill., dedicated to the competitive excellence and financial success of its 3,100 member companies which represent all facets of the electronics industry, including design, printed board manufacturing, electronics assembly and test. As a member-driven organization and leading source for industry standards, training, market research and public policy advocacy, IPC supports programs to meet the needs of an estimated $2.02 trillion global electronics industry. IPC maintains additional offices in Taos, N.M.; Arlington, Va.; Stockholm, Sweden; Moscow, Russia; Bangalore, India; and Shanghai, Shenzhen and Beijing, China.

You must be a registered user to talk back to us.

More News from Association Connecting Electronics Industries (IPC)

Feb 16, 2017 -

Long-time IPC Volunteer, Doug Pauls Inducted into IPC Hall of Fame

Feb 16, 2017 -

IPC Elects New Board Member

Feb 07, 2017 -

Best Technical Paper at IPC APEX EXPO 2017 Selected

Feb 06, 2017 -

Pana-Pacific Earns IPC/WHMA-A-620 Qualified Manufacturers Listing

Feb 03, 2017 -

IPC Invites Member-Company Executives to Help Build “Pulse-of-the-Industry” Data Service

Feb 02, 2017 -

North American PCB Sales Enjoyed Solid Growth in December

Jan 29, 2017 -

IPC President and CEO John Mitchell to Serve on the NAM’s Council of Manufacturing Associations Board of Directors

Jan 21, 2017 -

IPC North American EMS and PCB Statistical Programs Open

Jan 17, 2017 -

Colonial Assembly and Design, LLC Earns IPC J-STD-001 and IPC-A-610 Qualified Manufacturers Listing

Dec 27, 2016 -

Newly Elected Congressman Discusses U.S. Policy Priorities with Bay Area Manufacturers

(802) more news from Association Connecting Electronics Industries (IPC)

IPC-4204A Provides Guidance on High Speeds and Fine Lines news release has been viewed 577 times

Smart Factory Starter Kit - KIC

Software for SMT