1. Q: My wafer products have been in storage for a long time. What should I do to ensure that these parts can be used in my application?
A: The vacuum seal bag must be inspected first to determine if moisture has penetrated the barrier bag. Additionally, a preliminary surface cleanliness and visual inspection should be performed to look for any type of wafer anomalies.
2. Q: What instructions would I have if this old material is at risk?
A: Even without a visual indication of the problem, there is a chance that something goes wrong. However, with proper testing performed up front, any potential risk can be reduced.
Regarding long-term storage of wafer and chip semiconductor IC products
3. Q: What are the storage recommendations?
A: It is recommended to store wafers in an environmentally controlled area and in a suitable container, vacuum sealed if possible. Non-vacuum sealed wafers must be placed in a nitrogen cabinet. In an environmentally controlled area, FED STD 2091000 class\/ISO 14644- Class 16 or below, wafers can be stored in open containers while being tested in a queue or during processing. Wafers can be shipped in separate wafer carriers without the need for a top cover as long as the area is Class 1000\/ ISO class 6 or below.
4. Q: Assuming I store these wafers properly, how long is the shelf life of my product?
A: General specifications allow wafers to be stored indefinitely prior to use. It is recommended to follow disposal procedures that ensure good manufacturability in order to use stored wafers for extended periods of time.