Conformal coating enhanced to provide heat detection

• US 7,619,867 B2
• Filed: 10/10/2002
• Issued: 11/17/2009
• Est. Priority Date: 10/10/2002
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Kuczynski, Joseph Paul, Christensen, Dale Larry, Poleschuk, Nicholas Alexander Jr.
• Primary Examiner(s): Leja; Ronald W
• Application Number:
  US10/268,738
• Publication Number:
  US 20040074651A1
• Time in Patent Office: 2,595 Days
• Field of Search: 361/103, 73/232, 340/632
• US Class Current: 361/103
• CPC Class Codes: H05K 1/0201 Thermal arrangements, e.g. for cooling, heating or preventing overheating
• CPC Class Codes: H05K 2201/10151 Sensor
• CPC Class Codes: H05K 2203/083 Evaporation or sublimation of a compound, e.g. gas bubble generating agent
• CPC Class Codes: H05K 3/284 for encapsulating mounted components H05K1/185 takes precedence

Abstract

Disclosed is an enhanced conformal coating, a process for making the same, and several computer related applications. A commercially available conformal coating is combined with a commercially available blowing agent (sometimes called a “foaming agent”) to create an enhanced conformal coating. The formulation of the enhanced coating is such that it will emit a particular gas when heated to a particular temperature. The enhanced coating is then applied to an object to which pre-damage heat detection is desired. A sensor, located proximate to the object, is then used to detect the emitted gas. Once the gas is detected, actions can be taken to reduce the heat in a manner appropriate for the particular object. Application of the enhanced coating within the computer industry can involve its use with a particular electrical component or a group of electrical components (e.g., a circuit board). For example, the enhanced coating can be applied to one or more circuit boards. The coated boards and an appropriate gas sensor are then installed in a computer system housing. When the sensor detects a particular gas, it conveys information to the system regarding the possibility of excess heat. The system can then take remedial action.

Claims

1. An article of manufacture, said article of manufacture comprising:

an active electrical component which receives electrical power and generates heat to perform at least one data processing function during operation, said electrical component being coated with a conformal coating, said conformal coating being formulated to emit a particular gas at a particular temperature, said particular temperature being substantially lower than a lowest temperature causing irreversible damage to a capability of said active electrical component to perform said at least one data processing function, said particular gas being detectable by a detection mechanism to take corrective action to reduce the temperature of said active electrical component before said irreversible damage to a capability of said active electrical component to perform said at least one data processing function occurs.

2. The article of manufacture of claim 1 wherein said electronic component is a circuit board.

3. The article of manufacture of claim 2 wherein said electronic component is located proximate to a gas sensor of said detection mechanism.

4. The article of manufacture of claim 1 wherein said corrective action is selected from the group consisting of:

cooling said electrical component;

terminating power to said electrical component; and

reducing power to said electrical component.

5. The article of manufacture of claim 4 wherein said electrical component is part of a computer system.

6. An apparatus, said apparatus comprising:

at least one active electrical component which receives electrical power and generates heat to perform at least one data processing function of said apparatus during operation thereof, said electrical component being coated with a conformal coating, said conformal coating being formulated to emit a particular gas at a particular temperature, said particular temperature being substantially lower than a lowest temperature causing irreversible damage to a capability of said electrical component to perform said at least one function, said electronic component being located proximate to a gas sensor such that said gas sensor can detect said particular gas and signal a notification of the presence of said particular gas; and

a processor;

said processor being configured to receive said notification and to shutdown said apparatus before said irreversible damage to a capability of said electrical component to perform said at least one function occurs.

7. The apparatus of claim 6 wherein said processor is configured to determine, responsive to receiving said notification and using data from said gas sensor, whether a need for an immediate shutdown to prevent said irreversible damage exists;

to perform an immediate shutdown responsive to determining that a need for an immediate shutdown to prevent said irreversible damage exists; and

to perform a normal shutdown responsive to determining a need for an immediate shutdown to prevent said irreversible damage does not exist.

8. The method of claim 7 wherein said processor is further configured to:

determine a first outgas level;

determine a second outgas level;

determine whether a rate of increase between said first outgas level and said second outgas level is sufficiently slow to permit a normal shutdown; and

perform said normal shutdown when said rate of increase is sufficiently slow to permit said normal shutdown.

9. The apparatus of claim 6, wherein said apparatus is a computer system.

10. A program product, said program product comprising:

a computer recordable medium; and

a shutdown controller stored on said computer recordable medium, said shutdown controller being configured to monitor a gas sensor during operation of an apparatus having at least one active electrical component, said at least one active electrical component receiving electrical power and generating heat to perform at least one data processing function of said apparatus during operation thereof, said at least one active electrical component being coated with a conformal coating, said coating being formulated to emit a particular gas at a particular temperature, said particular temperature being substantially lower than a lowest temperature causing irreversible damage to a capability of said at least one active electrical component to perform said at least one function, said shutdown controller performing the following steps;

receiving a notification of detection of said particular gas from said gas sensor; and

shutting down said apparatus before said irreversible damage to a capability of said at least one active electrical component to perform said at least one function occurs, said shutting down step being responsive to receiving said notification.

11. The program product of claim 10 wherein said shutting down step comprises:

determining, using data from said gas sensor, whether a need for an immediate shutdown to prevent said irreversible damage exists;

performing an immediate shutdown responsive to determining that a need for an immediate shutdown to prevent said irreversible damage exists; and

performing a normal shutdown responsive to determining a need for an immediate shutdown to prevent said irreversible damage does not exist.

12. The program product of claim 11 wherein said step of performing a normal shutdown further comprises the steps of:

determining a first outgas level;

determining a second outgas level;

determining whether a rate of increase between said first outgas level and said second outgas level is sufficiently slow to permit a normal shutdown;

performing said normal shutdown when said rate of increase is sufficiently slow to permit said normal shutdown.

13. A method for managing operation of an apparatus, said method comprising the following steps:

operating at least one active electrical component of said apparatus, said at least one active electrical component receiving electrical power and generating heat to perform at least one data processing function of said apparatus during operation thereof, said at least one active electrical component being coated with a conformal coating, said coating being formulated to emit a particular gas at a particular temperature, said particular temperature being substantially lower than a lowest temperature causing irreversible damage to a capability of said at least one active electrical component to perform said at least one function;

receiving a notification of detection of said particular gas from a gas sensor; and

shutting down said apparatus before said irreversible damage to a capability of said at least one active electrical component to perform said at least one function occurs, said shutting down step being responsive to receiving said notification.

14. The method of claim 13 wherein said shutting down step comprises:

determining, using data from said gas sensor, whether a need for an immediate shutdown to prevent said irreversible damage exists;

performing an immediate shutdown responsive to determining that a need for an immediate shutdown to prevent said irreversible damage exists; and

performing a normal shutdown responsive to determining a need for an immediate shutdown to prevent said irreversible damage does not exist.

15. The method of claim 14 wherein said step of performing a normal shutdown further comprises the steps of:

determining a first outgas level;

determining a second outgas level;

determining whether a rate of increase between said first outgas level and said second outgas level is sufficiently slow to permit a normal shutdown; and

performing said normal shutdown when said rate of increase is sufficiently slow to permit said normal shutdown.