SEMI International Standards
Standards New Activity Report Form (SNARF)
Date Prepared: 04/15/2024Revised (if Applicable):

Document Number: 7242
SNARF for: New Standard: Guide for Reliability of Flexible Hybrid Electronics

Originating Global Technical Committee: Flexible Hybrid Electronics (FHE)
Originating TC Chapter: North America
Task Force (TF) in which work is to be carried out: FHE Reliability and Testing Task Force
Note: If a new task force is needed, also submit a task force organization form (TFOF)

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1. Rationale:
a. Describe the need or problem addressed by this activity.
(Indicate the customer, what benefits they will receive, and if possible, quantify the impact on the return on investment [ROI] if the Document is implemented.)
There is a need to explore and create consensus-based FHE standards pertaining to the testing required to ensure the reliability of FHE-integrated systems. Reliability data is limited, and there is a need to identify pertinent data for reliability assurance and important variables that should be monitored during accelerated testing. Application-based reliability design rules will enable fewer design iterations, reduce time to market, and shorten product ramp-up.

Consistency in the acquired data is presently limited. Thus, the development of standardized data collection protocols will promote mutual understanding and improve communications between designers, users, and suppliers of FHE integrated systems, components, materials, and testing hardware. Doing so will enhance the design robustness and capability to improve the system’s design and manufacturing efficiency.

In order to address the above-mentioned shortcoming, this document will focus on methods for evaluation of incoming FHE assembly materials, including but not limited to substrates, inks, interconnect materials, encapsulants, and electronic components in fabricated FHE test vehicles post assembly to determine the reliability of the combined design and production process.


b. Estimate effect on industry.
2: Major effect on an industry sector - identify the relevant sector
Sector or Company Information: Manufacturers, Integrators or Testers of FHE systems.

c. Estimate technical difficulty of the activity.
III: Difficult - Limited expertise and resources exist and/or achieving consensus is difficult

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2. Scope:
a: Describe the technical areas to be covered or addressed by this Document development activity. For Subordinate Standards, list common concepts or criteria that the Subordinate Standard inherits from the Primary Standard, as well as differences from the Primary Standard:
This document will focus on methods for evaluation of FHE assemblies and systems, including but not limited to substrates, inks, interconnect materials, encapsulants, and electronic components in fabricated FHE test vehicles post assembly to determine the reliability of the combined design and production process.

The scope will include the following topics and sub-elements:
1. Accelerated Tests and Test-Levels
Identify the considerations in the selection of accelerated tests, levels, and durations based on:
(a). Considerations in Test Design: Speed of Test, e.g. ink performance during the life of the part post assembly. Ink adhesion after environmental tests.
(b). Time-Zero Performance - followed by an accelerated test, e.g., bend, twist, THB/HAST, stretch, fold, Flex-to-Install, High Temperature, Wide Temperature Excursions, High-G Shock, Peel/Shear.
(c). Reliability test both pre and post-assembly.
2. Failure Modes and Mechanisms
Focus on the long-term time-dependent reliability and the propensity of the expected failure modes and mechanisms during in-service and post-assembly:
(a). Interconnects for component attachment - electrical and mechanical performance
(b). Interface Adhesion with a focus on circuit-substrate-dielectrics, interconnect-pad, dielectrics-substrates, printed components, rigid components, underfills, encapsulants, chip-adhesion
(c). Component failures - broken-die, discrete components, de-adhesion, delamination, embrittlement.
(d). Effect of downstream processing on the ink performance and reliability
(e). Detection methods for each of the failure modes and mechanisms
(f). Deviation that constitutes a failure – e.g. allowed level of delamination or voiding, number of high resistance events.
3. Qualification of New and Replacement Materials
The qualification of new and replacement materials will focus on the quantification of the following attributes in finished assemblies and systems:
(a). Flexibility and stretchability that are needed in the application
(b). Processing Temperature - High and Low Limits expected in the application.
(c). Achievable Adhesion with existing material sets in the system
(d). Dielectric Properties
(e). Thermal Performance
(f). Electrical Performance of the system
(g). Shear Load at Failure
(h). Warpage post-assembly
(i). Effect of repetitive strains on mechanical and electrical performance

4. System-Level Qualification
The process of qualifying the systems for use in the intended environment through the analysis of the following attributes:
(a). System input and outputs under accelerated and use-case stresses
(b). Burn-In Tests
(c). Environment Stress Screening
5. Modeling Methods for Life Prediction
Identify the modeling methods guidance for specific use-case stresses and accelerated tests to assure system reliability in the intended use application, including but not limited to:
(a). Life Prediction
(b). Warpage
(c). Damage: Strains, Stresses, Plastic Work
(d). Thermal Management
Interconnects - performance stability and reliability

b: Expected result of activity
New Standard or Safety Guideline (including replacement of an existing Standard or Safety Guideline)

For a new Subordinate Standard, identify the Primary Standard here:




For Standards, identify the Standard Subtype below:
Guide

Miscellaneous (describe below):

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3. Projected Timetable for Completion:

a: General Milestones
a. Activity Start: 05/13/2024b. 1st Draft by: 09/30/2024
c. (Optional) Informational Ballot by: d. Letter Ballot by: 11/22/2024
e. TC Chapter Approval By:03/01/2025

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4. Liaisons with other Global Technical Committees/TC Chapters/Subcommittees/TFs:
a. List SEMI global technical committees, TC Chapters, subcommittees, or task forces in your or other Regions/Locales that should be kept informed regarding the progress of this activity. (Refer to SEMI Standards organization charts and global technical committee charters and scopes as needed.)
FHE GTC TFs

b. List any planned Type I Liaisons with external nonprofit organizations (e.g., SDO) that should receive Draft Documents from Standards staff for feedback during this activity and be notified when the Letter Ballot is issued (refer to Procedure Manual § 7):
N/A

c. Intercommittee Ballots:
will not be issued

Identify the recipient global technical committee(s):

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5. Safety Considerations:
The resulting document is expected:
NOT to be a Safety Guideline

NOTE FOR "to be a Safety Guideline": When all safety-related information is removed from the Document, the Document is NOT technically sound and complete - Refer to Section 15.1 of the Regulations for special procedures to be followed.

NOTE FOR "NOT to be a Safety Guideline": When all safety-related information is removed from the Document, the Document is still technically sound and complete.

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6. Intellectual Property Considerations:
Note: Both a: and b: below should be checked for Revision of existing Standard(s) and Safety Guideline(s).

a. For a new Standard or Safety Guideline and for any part to be modified or added in a Revision of published Standards and Safety Guidelines:
the use of patented technology is NOT required.

If "patented technology is intended to be included in the proposed Standard(s) or Safety Guideline(s) " is selected above, then also check one:


b. For Revision, Reapproval, Reinstatement, or Withdrawal of existing Standard(s) and Safety Guideline(s):


c. The body of the Document and any Appendices, Complementary Files, Related Information sections, or Various Materials that may or may not be a part of the Document by reference:
the incorporation of Copyrighted Item will NOT be required



NOTE FOR ‘the use of patented technology or the incorporation of Copyrighted Item(s) is NOT required’: If in the course of developing the Document, it is determined that the use of patented technology or Copyrighted Item(s) is necessary for the Document, the provisions of Regulations § 16 must be followed.

NOTE FOR ’will incorporate Copyrighted Item’: A copyright release letter must be obtained from the copyright owner prior to publication.

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7. Comments, Special Circumstances:
 Passed A&R Cycle 11-2025 
Published as SEMI FH5-0526

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8. TC Member Review:
took place between (put dates below) before approval by the GCS, or

Member Review Start Date; 04/16/2024
Member Review End Date: 04/29/2024

NOTE FOR ‘TC Member Review’ is required by the Regulations for a period of at least two weeks
before approval of a new, or a major revision of an existing, Standard or Safety Guideline. (Refer to Regulations ¶ 8.2.1)
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9. SNARF Approval Dates:
TC Chapter or GCS05/10/2024
Recorded in TC Minutes

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10. SNARF Extension Dates:
TC Chapter Extension Granted on
Extension Expires on