{"id":2846,"date":"2026-09-14T02:00:00","date_gmt":"2026-09-14T02:00:00","guid":{"rendered":"https:\/\/swesd.com\/?p=2846"},"modified":"2026-09-14T02:00:00","modified_gmt":"2026-09-14T02:00:00","slug":"jedec-tray-material-selection","status":"publish","type":"post","link":"https:\/\/swesd.com\/fr\/blog\/jedec-tray-material-selection\/","title":{"rendered":"Comment choisir les mat\u00e9riaux des plateaux JEDEC pour l'emballage des circuits int\u00e9gr\u00e9s"},"content":{"rendered":"

How to Choose JEDEC Tray Materials for IC Packaging requires a route-specific engineering decision, not a catalog shortcut. The practical objective is to select a tray resin and ESD formulation that survives the actual thermal, mechanical, cleanliness and handling route. This guide turns that objective into drawing inputs, supplier questions, sample trials, receiving checks and change-control records. It avoids universal material claims and invented limits: final values must come from the approved device drawing, facility ESD program, current standards, supplier data and qualified tests.<\/p>\n

Define the Use Case Before Choosing the Tray<\/h2>\n

Start with the protected item and its complete journey. Record the device or assembly number, revision, maximum and minimum geometry, vulnerable features, approved contact areas, orientation and sensitivity information. Then map loading, internal transport, storage, cleaning, heat exposure, equipment interfaces, shipment and unloading. A tray that works at one bench may fail when stacked, moved through a loader or cleaned with a different chemistry.<\/p>\n

Assign owners to the decision. Process engineering defines how the tray is used, quality defines evidence and sampling, the ESD coordinator defines the electrostatic function, and purchasing controls commercial assumptions and changes. The supplier should receive one consolidated requirement rather than conflicting notes from separate departments.<\/p>\n

\"jedec
BGA matrix IC tray from the SWESD IC tray product page<\/figcaption><\/figure>\n

Translate the Search Term into Measurable Requirements<\/h2>\n

The phrase jedec tray material<\/strong> is useful for finding options, but it is not an acceptance specification. Convert it into characteristics that can be observed or tested. Separate mandatory limits from preferences, name the method and conditioning, and identify the drawing revision. If a reliable limit is not yet known, define a prototype trial instead of borrowing a number from an unrelated product page.<\/p>\n

\n\n\n\n\n\n\n\n\n
Decision area<\/th>\nWhat the buyer should define<\/th>\nVerification approach<\/th>\n<\/tr>\n<\/thead>\n
Temperature exposure<\/td>\nOperating, cleaning and any bake profile<\/td>\nUse the tray supplier\u2019s controlled material data and validate the complete tray<\/td>\n<\/tr>\n
Electrical role<\/td>\nLow-charging, dissipative or conductive behavior<\/td>\nState method, conditioning and acceptance range<\/td>\n<\/tr>\n
Mechanical duty<\/td>\nPocket retention, stiffness, warpage and stack load<\/td>\nTest worst-case devices and a representative stack<\/td>\n<\/tr>\n
Process chemistry<\/td>\nWash agents, labels and contamination limits<\/td>\nRun compatibility and residue trials<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

This decision table is intentionally qualitative. Tray performance depends on geometry, material formulation, environment and the test setup. Numeric values belong in the controlled project specification and should be supported by the applicable standard, manufacturer documentation or qualified measurement.<\/p>\n

Control Drawings, Samples and Revisions<\/h2>\n

Use a controlled 2D drawing for critical dimensions and a 3D model where complex pockets or equipment interfaces benefit from it. Identify datums, tolerances, contact zones, orientation features, stack interfaces and label areas. Mark dimensions as critical, reference or supplier process-control characteristics so incoming inspection does not waste effort while missing the features that protect the device.<\/p>\n

Physical samples add information that drawings cannot fully convey, such as operator access, stiffness and the feel of a stack seating. They do not show the full tolerance or every material condition. Approval should therefore link the sample to its drawing, resin or construction, cavity or production lot, test evidence and signed deviations. Any later change needs a documented review of the characteristics it can affect.<\/p>\n

Evaluate the Complete System<\/h2>\n

Test the tray as it will actually be used. Include the device, inserts, covers, labels, restraints, outer packaging, shelves and handling equipment where relevant. A material coupon cannot reveal a pinched lead, unstable stack, blocked vacuum pickup, isolated conductive surface or label that interferes with a sensor. The complete system is the meaningful unit of approval.<\/p>\n

Environmental history also matters. Record conditioning, cleaning, temperature, humidity and prior use when they can influence the result. Compare suppliers only when the same method and conditions are used. If the facility\u2019s ESD plan requires a resistance range or grounding behavior, state the surface, electrode arrangement, test voltage, measurement locations, sample count and disposition rule.<\/p>\n

\"jedec
Alternative matrix layout on a real SWESD IC tray<\/figcaption><\/figure>\n

Prototype Approval Sequence<\/h2>\n
    \n
  1. Document review:<\/strong> confirm the device revision, route, tray role, drawing, material restrictions and acceptance methods.<\/li>\n
  2. First article:<\/strong> verify identity, workmanship and critical dimensions before valuable devices are introduced.<\/li>\n
  3. Fit trial:<\/strong> load minimum and maximum device conditions, then check contact, rotation, lift and removal.<\/li>\n
  4. Stack trial:<\/strong> test the actual stack quantity with the intended cover, restraint and storage interface.<\/li>\n
  5. Process trial:<\/strong> reproduce equipment handling, cleaning, heat, labels and normal operator actions.<\/li>\n
  6. Evidence review:<\/strong> confirm test method, conditioning, sample identity, result, date and acceptance criterion.<\/li>\n
  7. Release:<\/strong> save the approved drawing, sample identity, deviations, photographs and receiving plan.<\/li>\n<\/ol>\n

    Run the sequence as gates. A failure should stop progression until the cause is understood and the affected requirement is retested. Cosmetic approval cannot override a functional failure. Conversely, harmless appearance variation should not become an unplanned rejection rule; defect definitions should connect to function or an agreed visual standard.<\/p>\n

    Incoming Inspection and Supplier Control<\/h2>\n

    At receiving, separate supplier lots before sampling. Check purchase identity, drawing revision, quantity, packaging condition and required documents. Inspect for cracks, flash, contamination, distortion, incomplete features and incorrect labels. Measure critical characteristics using the same datum and method used during approval. A fit or stack check with a controlled master can quickly detect a wrong revision, but it should not replace required measurements.<\/p>\n

    Sampling frequency should follow risk, supplier performance and the quality system rather than a universal percentage. Retain results by supplier lot and, when relevant, mold cavity. If a lot fails, quarantine it before mixing with accepted inventory. Document expanded inspection, rework, return or concession decisions and assess whether previously used trays are affected.<\/p>\n

    Maintenance, Reuse and Change Control<\/h2>\n

    Define what users inspect before reuse: pocket damage, wear, contamination, warpage, stack seating, labels and any grounding interface. Cleaning instructions should name approved tools and chemistry, rinse or drying steps and release criteria. Retirement rules need observable triggers. \u201cUse until damaged\u201d is too vague unless the organization defines damage that matters.<\/p>\n

    Supplier changes to resin, additive, coating, mold, cavity, site, process or subcontractor can affect performance even when the part number stays the same. The purchase agreement should require notification and identify the evidence needed for requalification. The review can be proportional to the change, but it should be completed before changed product enters normal inventory.<\/p>\n

    \"jedec
    Fine-pitch QFN matrix tray from the SWESD product range<\/figcaption><\/figure>\n

    Common Failure Modes<\/h2>\n