Totech America’s X Dry Brand Desiccant Dry Cabinets is the 1st auto-electronic desiccator that can maintain ultra low relative humidity of under 1%RH in the world. Totech America has been the MSD storage experts in North America since introducing digitally controlled Desiccant Dry Cabinets five years ago. Totech America’s X Dry cabinets are designed to eliminate Moisture Sensitive Device (MSD) defects such as; micro-cracks, voids, depanaling and delamination etc. Currently more than 500 American companies, including Lockheed, General Dynamics, NASA, Intel and hundreds of others have selected Totech America’s digitally controlled Desiccant Dry Cabinets to protect their valuable inventory. With the use of Desiccant Dry Cabinets, potential moisture related defects of IC packages and Printed Circuit Boards (PCBs) can be effectively and easily reduced or prevented. With the introduction of lead-free processes the proper handling and care of MSD will become even more critical.
Storage of SMD packages after their removal from moisture barrier bags
Storage of PCB (equipped on both sides) during manufacturing process
Storage of Printed Circuit Board during the examination process
1) IC packages
Ultra-low humidity storage and handling of unsealed CSP, BGA, QFP etc
Ultra-low humidity storage of PLD during the programming process
2) PCBs
Dehumidification and moisture-proofing of Organic Thin Layered Boards, Printed Wiring Boards
Ultra-low humidity handling of Pattern Film during its production process
3) Silicon Wafer
Anti-oxidation
High quality control with dust-proofing
4) Ceramics
Ceramic Board, Ceramics Condenser and other Ceramics-related materials (powder)
5) Liquid Crystal Glass (LCG) Board
Dehydration under the ambient temperature after polishing (Maintaining balanced desiccating and prevention of discharging and adhesion of chemicals)
6) Optical Fiber, CCD etc
Ultra-low humidity storage of micro-lens
Long term dehumidification and moisture-proof storage of devices which are not suitable for high temperature baking
7) Crystal Resonator
Ultra-low humidity storage of Crystals, Electrode Materials and Binding Materials
8) Other Electric Components
Anti-oxidation of lead frame and bonding wire
IPC/JEDEC Standard (J-STD-033A)
IPC/JEDEC has concluded the following joint standard for the handling SMD
Moisture
Sensitivity
Level 2-4
Below 10% RH storage is necessary. After the removal from a moisture barrier bag, the floor life of dry packages which is exposed under the environment not exceeding 30ºC and 60%RH can be reset, if they are placed in a dry box not greater than 10%RH for a minimum desiccating period of 5X the expose time.
Moisture
Sensitivity
Level 5-5a
Below 5% RH storage is required. A minimum desiccating period of 10X the exposure time is necessary to dry the IC packages which are exposed not exceeding 30ºC and 60%RH after removing from a moisture barrier bag enough to reset their floor life.
Reference:
The floor life of IC packages after removing from the moisture barrier bag
Level
Floor Life*
1
unlimited at 30ºC / 85%RH
2
1 year
2a
4 weeks
3
168 hrs
4
72 hrs
5
48 hrs
5a
24 hrs
6
Baking is necessary
*After removal from a moisture barrier bag, the allowable time of IC packages exposed to a factory ambient not exceeding 30ºC and 60%RH
Totech America's X Dry Desiccant Dry Cabinets are the best choice for your ultra-low humidity storage
If parts are removed from moisture barrier bags and immediately placed into a Desiccant Dry Cabinet defects at the end of the line will be reduced.
Perfect ultra-low RH storage in Totech America's X Dry Brand Desiccant Dry Cabinets
Easy Operation: X Dry is simple to use, just plug it in, set it and forget it.
Auto-recycling: Absorbed moisture is discharged automatically as water vapor, no leakage or accumulation.
Cost-saving: X Dry Desiccant Dry Cabinets are entirely maintenance free. The only operating cost of the unit is electricity. On average the annual cost of electricity to power the unit will be about 1/20th of the annual cost of an N2 dry cabinet.
Series
Relative Humidity Ranges & Series Descriptions
X3 Series
Under 1% -50%RH (Drying Units x 3 )
Recommended when doors are opened more than once per hour.
X2 Series
2-50%RH (Drying Units x 2 )
Recommended when doors are opened less than once per hour
X1
Series
2-50%RH (Drying Units x 2 )
Recommended when doors are opened infrequently
X Dry Clean series
1-50%RH (Drying Unit(s) x 3), HEPA filter (Class 100 air purification)
This portable Clean Room / Desiccant Dry Cabinet combines ultra low RH storage with Class 100 Clean Room standards.
Mechanics of micro-cracks in Integrated Circuits (ICs) packages
Before reflow
Reflow process
IC packages
BGA,
CSP,
QFP,
TQFP,
etc.
Normal Storage
Moisture in the air is absorbed by the hygroscopic package.
Delamination during first stage heating.
As process continues additional heat and pressure causes increased delamination.
Internal package pressure causes cracks in the package.
Cracks do not necessarily cause immediate failures, but rather the package breach allows for gradual corrosion inside the IC chip.
ULTRA DRY Series Storage
Dry ULTRA DRY can remove accumulated moisture absorbed by packages.
JEDEC/IPC suggests the storage of device should be under 10%RH.
X DRY ULTRA DRY delivers ultra low humidity and precise RH control for your MSD storage requirements.
X Dry MAX DRY is recommended for storage of IC packages during the production process because of the quick recovery time after door opening.
MSD's & Lead Free
Moisture trapped inside MSDs will cause defects during the reflow process. The introduction of a lead free process will only aggravate this reality. The data below shows that the vapor pressure becomes greater and greater with increasing reflow temperatures.
This vapor pressure can cause micro-cracking and delamination inside MSDs and in the end will result in failures, both at test and latent defects in the fields. Using X Dry MAX or ULTRA series Desiccant Dry Cabinets moisture inside IC packages can be dehumidified to nearly 0% preventing defects which can be caused by moisture absorption.
Click here to see our extensive list of additional items that can be added to your dry cabinet. Options include everything from extra shelves and dividers to locks and alarms.
Totech America offers a wide selection of cabinets to choose from, including storage for printed circuit boards, optics, laboratory equipment, industrial equipment, collectables, media, and more (select an application at the top of this page). If you don’t find what you’re looking for click on our customs page, and our engineers will be happy to put together the perfect solution for you, at a cost that’s less expensive than you may think!
