Material or Product |
Form |
Shelf Life 1 |
Gold-Tin (AuSn) alloys. |
Solders, preforms, ribbon, frames, and physical vapor deposition materials |
12 Months from date of manufacture |
Gold-Germanium (AuGe), Gold-Silicon (AuSi), Gold-Beryllium ( AuBe), and Gold-Arsenic (AuAs) alloys; also Silver (Ag) alloys.
|
Solders, preforms, ribbon, frames, and physical vapor deposition materials |
6 Months from date of manufacture |
Lead (Pb) alloys.
|
Solders, preforms, ribbon, frames, wire, and physical vapor deposition materials |
3 Months from date of manufacture |
Gold (Au), Platinum (Pt), Palladium (Pd), and alloys thereof.
|
Solders, preforms, ribbon, frames, wire, and physical vapor deposition materials |
12 Months from date of manufacture |
Clad materials with both exposed sides comprised of a Gold (Au) based alloy where gold is the predominant percentage of the exposed alloy(s)
|
Preforms and ribbon |
6 Months from date of manufacture |
Clad materials with one or both exposed sides comprised of a Silver (Ag) or Lead (Pb) based alloy where silver or lead are the predominant percentage of the exposed alloy
|
Preforms and ribbon |
3 Months from date of manufacture |
Clad materials with one or both exposed sides comprised of an Aluminum (Al) based alloy |
Preforms and ribbon |
6 Months from date of manufacture |
Copper (Cu) |
Preforms and ribbon |
6 Months from date of manufacture |
Silver (Ag) and Silver (Ag) alloys |
Preforms, ribbon, and physical vapor deposition materials |
6 Months from date of manufacture |
Gold based Electronic Packaging Materials |
Frame Lid Assemblies, Gold Plated Lids, and Gold-Tin Frames |
12 Months from date of manufacture |
Non-Precious based Evaporation and Sputtering Materials (PVD Materials) |
Targets, Evaporation Pellets, Evaporation Clips, Evaporation Wire |
6 Months from date of manufacture |
Non-precious Materials (“Structural Metals”) |
Ribbon and Rod |
Indeterminate |
Gold and Platinum based fine bonding wire/ribbon |
Fine Wire and Ribbon |
12 Months (2) from date of manufacture |
Aluminum and Copper based fine bonding wire/ribbon |
Fine Wire and Ribbon |
6 Months (2) from date of manufacture |
1 - Some materials shipped may be recertified in terms of shelf life through functional testing at Williams Advanced Materials. If recertification is required, contact your Williams Advanced Materials sales representative to discuss recertification fees and where to send samples for recertification purposes. The shelf life can be extended on certain materials through rework such as: etching, abrading, or annealing in a reducing atmosphere.
2 - To attain maximum shelf life, fine wire must be stored in a nitrogen or argon dry box and must be positioned as shown to prevent shifting of the wire (which can result in despooling problems through tangling and overlap).
Williams is Dedicated to Supplying Quality Material