RU2816553C1 - Test bench of electronic component base for reliability - Google Patents

Abstract

FIELD: test equipment.

SUBSTANCE: invention can be used in test laboratories for evaluating reliability of electronic component base products. Stand is made in the form of two posts. In the first post there are sections with power sources, temperature control units, handles for individual setting of electric mode. On the front panel of the second post there are sections of loading units, intended for installation of tested products into clamping contact devices, which press the tested products to individual heat-removing plates with thermistors located on them and connected to temperature control units. On the rear panel of the second post there are sections of thermostating units, one for each section of loading units. Setting and maintaining temperature on heat-removing plates is carried out by the stand thermal control system, arranged in thermostating unit and changing power supplied to heater. Each section of the second post is equipped with retractable shelves with tanks and headers for forced supply of liquid heat carrier to individual heat-removing plates by means of a centrifugal pump. Individual tap is provided to adjust the temperature of each heat-removing plate.

EFFECT: possibility of setting individual thermal and electrical conditions of tested articles.

1 cl, 1 dwg

Description

The stand is designed for testing electronic component base (ECB) products for reliability and durability in accordance with GOST RV 20.57.414, GOST RV 20.57.416.

Field of technology to which the invention relates

The invention relates to the field of testing equipment and can be used in testing laboratories to confirm the reliability or assess the likelihood of failures of electronic components products.

State of the art

There is a well-known stand for testing electronic components products for reliability and durability under combined thermal and electrical load. The thermal load is provided by a common heat sink plate on which the tested products are installed. The stand provides testing at a heat sink plate temperature from 35 to 85°C. The electrical load is provided by stabilized power supplies, a bias voltage source, and excitation signal generators common to all tested products.

The disadvantage of this sample is the impossibility of setting the individual thermal and electrical conditions of the tested products.

A high-temperature dynamic system is known, manufactured by HangZhou ZhongAn Electronics Co., Ltd. (China), consisting of a climate chamber, which is not divided into zones and provides a common test temperature for products of up to 150°C. The electrical load is provided by power supplies with voltages up to 30 V.

A disadvantage of this sample is also the impossibility of setting the individual thermal and electrical conditions of the tested products.

A well-known reliability testing machine manufactured by STK TECHNOLOGY CO., LTD. (Japan), consisting of a climate chamber, which is divided into two zones and provides individual temperature control for products. The electrical load is set separately for each test zone.

The disadvantage of this sample is the impossibility of setting the individual electrical mode of the tested products.

Disclosure of the invention

The objective of this invention is to expand the range of thermal and electrical loads, import substitution, as well as the ability to set individual thermal and electrical conditions of the tested products.

This problem is solved by using a coolant with a boiling point of more than 150°C, installing power supplies with an output voltage of 0-60 V, as well as developed heat-removing plates with pressing contact devices to set the individual thermal and electrical conditions of the tested products.

Brief description of drawings

The design of the stand is shown in Fig. 1.

The stand is made in the form of two metal stands. The first rack contains sections with power supplies 1 (Fig. 1), temperature control units 2, as well as handles for individual setting of the electrical mode 3. On the front panel of the second rack there are sections of loading units 4, on the rear panel there are sections of thermostatting units, one per each section of loading blocks (not shown in the figure). Each section of the second rack is equipped with retractable shelves with tanks and manifolds for supplying coolant to the heat-removing plates.

Implementation of inventions

The loading block is designed for installation of test products into clamping contact devices for subsequent testing in the required thermal and electrical conditions.

To ensure the specified thermal conditions, the tested products are pressed against individual heat-removing plates using contact devices. Setting and maintaining the temperature on the heat-removing plates of the loading block is carried out by the stand's thermal control system located in the thermostatting block.

The thermostating unit uses a system of liquid thermal stabilization of heat sink plates with forced supply of coolant. Liquid is pumped through the heat-removing plates by a centrifugal pump from the tank. The coolant is heated by a tubular electric heater. Maintaining a stable temperature of the coolant and heat sink plates is ensured by a thermal control system that changes the power supplied to the heater. An individual tap is provided to accurately regulate the temperature of each heat sink plate. The thermostating unit ensures testing at the temperature of the heat sink plates from 35°C to 125°C.

The electrical test mode is provided by power supplies connected to the loading unit. For each product, individual adjustment of the electrical mode is provided using control knobs, which are located on the front panel of the stand.

The temperature control unit reads the resistance values of the thermistor located on the heat sink plate. The data is processed programmatically and displayed on the screen.

Claims (1)

A stand for testing electronic component products for reliability and durability, consisting of sections with power supplies, temperature control units, loading units, including pressing contact devices and individual heat-removing plates, thermostatting units, characterized in that the stand is made in the form of two metal racks, in the first rack there are sections with power supplies, temperature control units, as well as handles for individual setting of the electrical mode; on the front panel of the second rack there are sections of loading units connected to power sources and intended for installing the tested products into clamping contact devices that press test products to individual heat-removing plates with thermistors located on them, connected to temperature control blocks; on the rear panel of the second rack there are sections of thermostatting blocks, one for each section of the loading blocks; setting and maintaining the temperature on the heat-removing plates of the loading block is carried out by the thermal control system of the stand, located in the thermostatting unit and changing the power supplied to the heater, each section of the second rack is equipped with retractable shelves with tanks and manifolds for forced supply of liquid coolant to individual heat-removing plates using a centrifugal pump, and an individual tap is provided to regulate the temperature of each heat-removing plate.