Burn-in, Reliability & Life Test
The Chroma 58604 is a high density, multifunction, and temperature controlled module based system for laser diode burnin and lifetime tests. Each module has up to 256 SMU channels which can source current and measure voltage in various control modes as described below. The system can accommodate 7 modules for a total of 1792 SMU channels.
Auto Current Control Mode (ACC)
In auto current control (ACC) mode, the control circuit will provide the preset current to each laser diode with high stability. Even with fluctuations in device resistance and temperature, the current will be kept constant over the test period. The device voltage will be recorded as a quality reference parameter.
Auto Power Control Mode (APC)
With feedback signal from the optional external Photo Diode PCB or the onboard Monitor Photo Diode (MPD), the control circuit can adjust the laser diode current automatically to keep a constant optical power output over the test period. The device voltage and current are recorded as quality parameters for reference.
Temperature Control
A proprietary designed heat plate will control the laser diode case temperature with high accuracy, excellent stability, and good uniformity. This thermal condition approach is much more compact, easier to operate, offers better performance, and energy saving over chamber based systems. Customers gain the benefit of a small footprint, versatile usage, and easy maintenance.
Independent Module Operation
Customers can set each modules to a set test program varying from all other modules in the system. Variation includes all parameters including temperatures, Control Modes (APC/ACC), start times and test durations. Modules can also accept fixtures for a variation of CoS and packages so allowing for multiple device types in one system. This provides the highest flexibility in operation.
Protection and Individual Channel Shutdown
The control circuit is specially designed for protecting each laser diodes. No in-rush current or voltage will occur to hurt the devices. High/ Low limits of current and voltage can be set to perform shutdown protection. When abnormality happens, only the particular channel will be shutdown while others are running normally. Ensuring device safety , ESD protection is also sustained in the system design.
Auto Data Recovery after Communication Interruption
The burn-in data is stored in the system PC and optionally in remote servers. If the communication between the module and PC is temporarily broken, the data will be buffered in the module 6 hours or more. After the communication is restored, the buffered data will be dumped to the PC/server without loss.
User Friendly SoftPanel
The soft panel provides an intuitive visual interface that one can check certain device at certain module with some simple mouse-clicks anytime during the tests. The burn-in raw data are stored in Microsoft Excel compatible format for further analysis. Optional barcode system can be cooperated for test management.
▲ Flexible to choose condition
▲ Comprehensive test data
▲ GUI calibration interface
▲ TO-CAN carrier
▲ CoC carrier
▲ Test Fixture
