DE102007019055A1 - Method for adjusting temperature of electronic components heated using hot air uses signals from temperature sensor to suddenly reduce flow of air to heater when temperature of component reaches threshold value - Google Patents
Method for adjusting temperature of electronic components heated using hot air uses signals from temperature sensor to suddenly reduce flow of air to heater when temperature of component reaches threshold value Download PDFInfo
- Publication number
- DE102007019055A1 DE102007019055A1 DE102007019055A DE102007019055A DE102007019055A1 DE 102007019055 A1 DE102007019055 A1 DE 102007019055A1 DE 102007019055 A DE102007019055 A DE 102007019055A DE 102007019055 A DE102007019055 A DE 102007019055A DE 102007019055 A1 DE102007019055 A1 DE 102007019055A1
- Authority
- DE
- Germany
- Prior art keywords
- temperature
- hot air
- component
- temperature sensor
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/012—Soldering with the use of hot gas
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3494—Heating methods for reflowing of solder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
- B23K2101/40—Semiconductor devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/08—Treatments involving gases
- H05K2203/081—Blowing of gas, e.g. for cooling or for providing heat during solder reflowing
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/16—Inspection; Monitoring; Aligning
- H05K2203/163—Monitoring a manufacturing process
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/341—Surface mounted components
- H05K3/3431—Leadless components
- H05K3/3436—Leadless components having an array of bottom contacts, e.g. pad grid array or ball grid array components
Abstract
Description
Die
vorliegende Erfindung betrifft ein Verfahren zur Einstellung der
Temperatur eines elektronischen Bauelementes auf einen vorbestimmten
Wert bei der Erwärmung
des bauelementes mit der durch ein Heißluftgerät (
Beispielsweise werden beim so genannten Rework, bei dem einzelne Bauelemente einer Leiterplatte ein- oder ausgelötet werden, üblicherweise Heißluftgeräte verwendet, mit denen Heißluft auf die Bauelemente aufgebracht wird, wobei das Lot der Anschlusselemente der Bauelemente, beispielsweise der Balls vom SMD-Bauelementen, erwärmt und zum Schmelzen gebracht wird.For example become with the so-called Rework, with which individual components a Printed circuit board on or off are used, usually hot air devices, with those hot air is applied to the components, wherein the solder of the connection elements components, such as the ball of SMD components, heated and is melted.
Ein Problem besteht dabei darin, dass die Temperatur der Heißluft des Heißluftgerätes stets größer ist als die Temperatur des Gehäuses des ein- oder auszulötenden Bauelementes, weil bei der Energieübertragung von dem Heißluftgerät auf das Bauelement ein Wärmeverlust auftritt. Wenn also die Temperatur des Bauelementes einen vorbestimmten z. B. maximal zulässigen Wert erreicht, muss die Temperatur des Heißluftgerätes abrupt bzw. sprungartig nach unten gefahren werden, damit die vorbestimmte Temperatur des Bauelementes nicht überschritten wird, um z. B. Schädigungen des Bauelementes auszuschließen.One The problem is that the temperature of the hot air of the Hot air device is always larger as the temperature of the housing of the one to be soldered in or out Component, because in the energy transfer from the hot air device to the device a heat loss occurs. So if the temperature of the device has a predetermined z. B. maximum permissible Value reached, the temperature of the hot air device must abruptly or abruptly be moved down so that the predetermined temperature of the Component not exceeded is to z. B. damage to exclude the component.
Die
Aufgabe der vorliegenden Erfindung besteht darin, ein Verfahren
zur Einstellung der Temperatur eines elektronischen Bauelementes
auf einen vorbestimmten Wert bei der Erwärmung des Bauelementes mit
der durch ein Heißluftgerät (
Diese Aufgabe wird durch ein Verfahren mit den Merkmalen des Patentanspruches 1 gelöst.These The object is achieved by a method having the features of the claim 1 solved.
Der wesentliche Vorteil der vorliegenden Erfindung besteht darin, dass es mit relativ einfachen Mitteln, z. B. beim Rework von Leiterplatten, möglich ist, die Temperatur der Heißluft des Heißluftgerätes sprungartig nach unten abzusenken, wenn eine für ein ein- oder auszulötendes elektronisches Bauelement vorbestimmte Temperatur überschritten wird. Beim Rework von Leiterplatten ist dies von großer Bedeutung, weil der Schmelzpunkt des Lotes der Lötstellen des Bauelementes beispielsweise bei etwa 217C° liegt und die maximal zulässige Temperatur, auf die das Bauelement ohne Schädigungen erwärmt werden darf, etwa 230C° bis 250C° beträgtt. Dies bedeutet, dass in einem relativ kleinen Temperaturfenster gearbeitet werden muss, um zu verhindern, dass nach dem Erreichen der Schmelztemperatur des Lotes ein Überschreiten der vorbestimmten Temperatur des Bauelementes vermieden wird.Of the The essential advantage of the present invention is that it with relatively simple means, for. For example, reworking printed circuit boards, is possible, the temperature of the hot air of the hot air device leaps and bounds to lower down, if one for an electronic or electronic Component predetermined temperature is exceeded. At the rework of circuit boards, this is of great importance because of the melting point the solder of the solder joints of the component, for example, at about 217C ° and the maximum allowable temperature, on the the component without damage to be heated may, about 230C ° to 250C °. This means that worked in a relatively small temperature window must be in order to prevent after reaching the melting temperature a passing over of the solder the predetermined temperature of the component is avoided.
Vorteilhafterweise ist das erfindungsgemäße Verfahren nicht nur im Zusammenhang mit dem Ein- und Auslöten von Bauelementen beim sogenannten Rework anwendbar. Vielmehr kann es überall dann angewendet werden, wenn ein vorbestimmtes elektronisches Bauelement mit Heißluft erwärmt wird und vermieden werden soll, dass eine vorbestimmte Temperatur des Bauelementes überschritten wird.advantageously, is the inventive method not only in connection with the soldering and desoldering of components in the so-called rework applicable. Rather, it can be anywhere then be applied when a predetermined electronic component with hot air heated is to be avoided and that a predetermined temperature of the component exceeded becomes.
Im Folgenden werden die Erfindung und deren Ausgestaltungen im Zusammenhang mit den Figuren näher erläutert. Es zeigen:in the Below, the invention and its embodiments are related closer with the figures explained. Show it:
In
der
Die
Anschlusselemente des Bauelementes
Gemäß
Um
das schlagartige Absenken der Temperatur der Heißluft des Heißluftgerätes
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007019055A DE102007019055A1 (en) | 2007-04-23 | 2007-04-23 | Method for adjusting temperature of electronic components heated using hot air uses signals from temperature sensor to suddenly reduce flow of air to heater when temperature of component reaches threshold value |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007019055A DE102007019055A1 (en) | 2007-04-23 | 2007-04-23 | Method for adjusting temperature of electronic components heated using hot air uses signals from temperature sensor to suddenly reduce flow of air to heater when temperature of component reaches threshold value |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007019055A1 true DE102007019055A1 (en) | 2008-10-30 |
Family
ID=39777369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007019055A Withdrawn DE102007019055A1 (en) | 2007-04-23 | 2007-04-23 | Method for adjusting temperature of electronic components heated using hot air uses signals from temperature sensor to suddenly reduce flow of air to heater when temperature of component reaches threshold value |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102007019055A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022115545A1 (en) | 2022-06-22 | 2023-12-28 | Ersa Gmbh | Method for heating for unsoldering and/or soldering in electronic components, in particular in a rework soldering process, and associated soldering system |
-
2007
- 2007-04-23 DE DE102007019055A patent/DE102007019055A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022115545A1 (en) | 2022-06-22 | 2023-12-28 | Ersa Gmbh | Method for heating for unsoldering and/or soldering in electronic components, in particular in a rework soldering process, and associated soldering system |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R012 | Request for examination validly filed |
Effective date: 20140423 |
|
R120 | Application withdrawn or ip right abandoned |