Post-weld-shift in butterfly package

Huang, W.K.; Hsu, Yi‐Cheng; Sheen, Maw-Tyan; Cheng, Wood-Hi

doi:10.1109/emap.2002.1188816

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…Hsu et al [10] used four geometrical parameters to define the PWS for TO-Can-type laser modules and FEM simulation was performed to evaluate the PWS induced by laser welding. A few authors also made efforts to measure the PWS with micro displacement sensors such as eddy current sensor [14], High magnification CCD [15], laser displacement meter [16], [18]. Despite so many studies mentioned above on laser welding and PWS, simulation and experiment researches focused on laser hammering are very limited.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Experimental Study of Laser Hammering for Laser Diode Packaging

Ai-cheng

Chun

et al. 2007

IEEE Trans. Comp. Packag. Technol.

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Laser hammering is a key and effective technique to correct the post-weld-shift in laser welding process. In order to obtain a detailed understanding of the shrinkage deformation principle and magnitude induced by laser Hammering, a finite-element-method (FEM) is employed to analyze the welding shift for the TO-CAN style laser diode package. Detailed relations between welding shift and the beam energy pulse width are obtained. A welding shift measurement system with two noncontact capacitive displacement sensors with high accuracy and high resolution is established. The measurement system can determine the shift direction or deformation angle in real time. The experiment results of this paper will be helpful for the selection of laser beam parameters in the laser hammering process to achieve fast and accurate shift correction.Index Terms-Laser diode, laser hammering, laser welding, package, post-weld-shift (PWS).

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Section: Introductionmentioning

confidence: 99%

Simulation and Experimental Study of Laser Hammering for Laser Diode Packaging

Ai-cheng

Chun

et al. 2007

IEEE Trans. Comp. Packag. Technol.

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“…The nonlinear strain-displacement definition is used (6) where is strain tensor, denotes displacement vector. The total structure strain in a thermal stress problem is composed of elastic, thermal, and plastic components as (7) where is elastic strain, denotes thermal strain, refers to plastic strain.…”

Section: A Basic Governing Equations and Boundary Conditionsmentioning

confidence: 99%

“…Effectively controlling WIAD to maintain high coupling efficiency is obviously the most challenging issue in assembling of fiber-optic components using laser welding. WIAD or PWS has becoming an area of growing interest to researchers [6]- [11], and finite-element method (FEM) has been employed to predict or at least estimate the amount of WIAD that will occur. The factors that influence WIAD are various.…”

mentioning

confidence: 99%

Effect of welding sequence on welding-induced-alignment-distortion in packaging of butterfly laser diode modules: Simulation and experiment

Lin

Eichele²,

Shi

2005

J. Lightwave Technol.

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Abstract-Controlling welding-induced-alignment-distortion (WIAD) and maintaining coupling efficiency is obviously the most challenging issue in assembling of fiber-optic components using laser welding. WIAD is the dominant barrier to having high packaging yields. Previous investigation has revealed that the WIAD in butterfly laser diode module packaging could be mitigated by properly choosing weld process parameters such as welding sequence. In this paper, the effect of welding sequence on WIAD is studied numerically by finite-element method (FEM) with a more realistic physics based laser welding model and experimentally by welding prototype butterfly packages. Results from both methods are compared. It is shown that the influence of welding process parameters on WIAD is significant and WIAD control is possible if proper welding sequence is employed.Index Terms-Butterfly laser diode package, fiber optic component attachment, finite-element method (FEM), laser welding, packaging yield, welding-induced-alignment-distortion (WIAD), welding sequence.

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Online measurement and correction of post-weld shift in laser welding packaging for laser diodes

Yang

2009

Int J Adv Manuf Technol

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Post-weld-shift in butterfly package

Cited by 3 publications

References 9 publications

Simulation and Experimental Study of Laser Hammering for Laser Diode Packaging

Simulation and Experimental Study of Laser Hammering for Laser Diode Packaging

Effect of welding sequence on welding-induced-alignment-distortion in packaging of butterfly laser diode modules: Simulation and experiment

Online measurement and correction of post-weld shift in laser welding packaging for laser diodes

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