摘要:
A chip (201) is attached to a printed conductive surface. The chip is first heated to a first temperature, which is lower than what the chip can stand without being damaged by the heat. The heated chip is pressed against the printed conductive surface with a first pressing force. A combination of said first temperature and said first pressing force is sufficient to at least partly melt the material of at least one of: the printed conductive surface, contact point on the chip (205, 206).
摘要:
L'invention concerne un procédé de fabrication d'un module électronique (2) comportant une carte (3) ô circuit imprimé (4), au moins un composant d'un premier type (5) et un composant d'un deuxième type (6), le procédé comprenant les étapes de : - disposer de la brasure sur la carte, - positionner le composant du premier type, - fondre la brasure pour souder le composant du premier type, - positionner le composant du deuxième type de telle manière que celui-ci s'étende au-dessus du composant du premier type et ait des pattes (7) en appui sur la carte par de la brasure, - fondre la brasure pour souder le composant du deuxième type.
摘要:
A method and a system for height triangulation measurement are disclosed. The method and the system are particularly useful for measuring the height of an object on a surface e.g., bumps or small wafer. Three steps do the measurement. The first step is illuminating the object from a known angle with a narrow strip of light being spatially incoherent, having a large numerical aperture along the light strip and a small numerical aperture perpendicular to the light strip. The second step is imaging the object from a known angle having said large numerical aperture along the light strip and the small numerical aperture perpendicular to the light strip, having an image that includes the object and the light strip and the last step is calculating the height of the object from the location of the light strip on the image.
摘要:
Die Erfindung betrifft eine Löt-/ Klebevorrichtung mit einem Strahlerkopf. Er weist eine Heizquelle aus mehreren, nebeneinander in einem vorgegebenen Muster zueinander angeordneten Strahlersegmenten auf und ist in der Weise zusammengesetzt, dass zumindest eine vorgegebene Anzahl der Strahlersegmente unabhängig ansteuerbar ist, und dass die unabhängig ansteuerbaren Strahlersegmente mindestens einem vorgegebenen Untermuster zugeordnet sind.
摘要:
To provide a printing inspection apparatus and a printing inspection method enabling an optimal inspection mode in which a balance is kept between the improvement of production efficiency and the securing of a printing accuracy. In a printing inspection for inspecting a printing state of cream solder on a substrate (6) after screen priting, inspection data is generated by diving unit shape and position data, indicating the shapes and the positions of element solder print portions to be printed on electrodes (6b - 6e) provided in a circuit forming surface of the substrate to be used to bond electronic components, into date groups according to a group condition chosen in response to an inspection mode. A go/no-go judgment at the time of inspection is made per data group, and a judgment result is displayed for each data group. It is thus possible to choose an optimal inspection mode flexibility in response to the characteristics of a substrate as the subject to be inspected.
摘要:
A two-stage filtration system is coupled with an oven, such as a solder reflow oven, to remove a vapor stream from the oven and to remove organic compounds that have volatilized from a solder flux and other contaminants from the vapor stream. The filtration system includes a first stage for trapping larger particles and a second stage including a packed bed of wettable media, such as steel balls, for trapping smaller particles and serving as a nucleation site for condensed organic compounds. The first stage can be a centrifugal self-cleaning element in the form of a mesh strainer coupled with a rotary motor for spinning the mesh strainer.
摘要:
The production of character generators for non-mechanical printers requires the positionally precise soldering of light-emitting diode chips (LEDs) on module plates. The precision required in all three dimensions lies between ± 3 and 10 νm. A new device is composed of an adjusting device (4) and a soldering device separable therefrom that can carry out as a separate unit a soldering operation. A LED-row to be soldered on a module plate is temporarily adjusted and held on an auxiliary carrier (5) and brought during the soldering operation towards the solder-coated surface of the module plate (carrier (6)) in such a way that the components being soldered are joined only after the solder (2) has melted. For that purpose, spring joints which can be blocked in two predetermined positions and also intermediate fusible disks which melt shortly after the solder (2) on the module plate are used, allowing the joining of the components being soldered to be controlled. As a result, mechanical damage to the LED-rows are avoided and a highly precise positioning of the LED-rows and the module plate is obtained.
摘要:
A method and apparatus are described for precisely centering the leads of surface mountable electronic components on the pads of a printed circuit board. The method includes coating the pads with solder, placing the leads of the components on the solder coated pads, melting the solder and vibrating the leads relative to the pads while the solder is molten, so that the surface tension of the molten solder centers the leads on the pads. The molten solder is then cooled until it resolidifies.