McDry Ultra-Low Humidity Storage Cabinets

McDry Ultra-Low Humidity Storage Cabinets Description:

Prevent your components from micro-cracking during reflow with proper Ultra-Low Humidity Storage.

• DXU models of maintain1%RH
• Wide range of cabinets including UL/C models
• Conforms to IPC/JEDEC J-STD 033B.1
• Dehumidifies ICs to prevent micro-cracking
• Alternative to baking, MBBs and nitrogen storage
• ESD safe design

McDry dry boxes, dry cabinets and desiccators provide optimal ultra-low humidity and moisture-proof storage for IC packages. Moisture-sensitive components when safely and properly stored in McDry have an indefinite floor-life and micro-cracking or pop-corning during the reflow process is not an issue. Other ideal storage applications for McDry include original prints, printed wiring boards(PWBs), polymide film, tape reels, feeders and various electronic components and materials. This McDry Unit comforms to IPC/JEDEC J-STD 033B.1

Why do components require low humidity storage?

McDryTM Prevents Micro-Cracking of IC Packages During Reflow.

The high temperatures involved in vapor phase or reflow passes cause the absorbed moisture to expand rapidly. Micro-cracking occurs in nearly 100% of IC packages containing moisture during the reflow process. Occurring over an extended period of time, this can cause breakage of wiring and other problems. Micro-cracking can be prevented with storage and dehumidification of IC’s using McDry™ as well as resetting the floor life of components according to the IPC/JEDEC J-Std 033b.

Proper Storage for Moisture-Sensitive Components

Keep moisture-sensitive components safe during reflow with a desiccant dehumidifier and other humidity controlled storage cabinets. Some sort of low-humidity storage of surface mount devices is now a regular practice for any handling, shipping, packing and use of the components. This standard is due to the micro-cracking that occurs during the reflow process in close to 100 percent of all IC’s that have absorbed moisture. Micro-cracking can cause corrosion, breaking of wires and several other problems but can be prevented with McDry humidity-controlled storage cabinets. Use of a dry cabinet is a viable alternative to baking, MBB’s and nitrogen storage and may be more efficient in several ways.

Features of our Storage Cabinets

At Seika Machinery, we offer a type of dry cabinet that one might need for the proper dehumidifying of components. Choose from our DXU series or our MCU series, all of which offer an ultra-low humidity environment. Our DXU McDry models maintain a 1% RH giving the necessary ultra-low humidity storage capability needed.

Moisture is removed from all cabinets by use of an extremely powerful desiccant dehumidifier which eliminates the requirement of nitrogen. The desiccant is automatically recycled and therefore does not need to be replaced and the moisture gathered by the desiccant is discharged in vapor form outside of the dry cabinet. No fan is required due to the use of a natural air flow system and utilization of memory-shaped metal makes for nearly fail-proof aeration.

Damage from static electricity is thwarted by the grounding of all humidity-controlled storage cabinets while locking doors close tightly to prevent outside moisture.

McDry Storage Cabinets Applications

Low humidity storage of IC packages (MSD) which have been removed from moisture barrier bags. (To stop the floor life clock of CSPs, BGAs, TQFPs, etc.)

• Drying and storing multilayer PC boards before and after mounting.
• Dry storage of pattern film and prepreg used in the manufacturing of PCBs.
• Dry storage of semi-mounted PCBs. Effective low humidity storage of PCBs awaiting second-side reflow.
• Clean, room temperature drying of liquid crystal glass boards after washing. Results in even drying and prevents contamination.
• Dry storage of quartz crystals and electrode adhesives used in the manufacturing of quartz oscillators.
• Drying and storing of fiber optics (Micro-lens for WDM) and CCD (Solid-state image sensor.)
• Low humidity storage of electronic components to slow down oxidation.

Cost Effective

Our McDry desiccant dehumidifier cabinets are not only effective in preventing micro-cracking in moisture-sensitive components but they are cost efficient as well. Nitrogen cabinets require construction work to run nitrogen lines into the cabinet and moisture-barrier bags need a desiccant, sealing machine, RH indicator and some manual labor. Our cabinets can also eliminate the need for baking components in some cases and requires only the cost of electricity.