New Equipment | Test Equipment
The PDR IR-TS One HALT/HASS Test System has been designed to thermally cycle key critical components and assemblies to detect defects. Using PDR’s unique Non-Destructive Dual Thermal Stress Screening Process, based on a variation on HALT/HASS princip
Industry News | 2015-05-13 14:00:03.0
The evolution of soldering processes in the Microelectronics Industry has made a paradigm shift away from Sn/ Pb to Pb-free. Compounded with advancements in miniaturization, Pb- free soldering's higher re-flow temperature and the nature of solder has resulted in poor reliability relative to: mechanical strength of the solder joint, warpage and thermal cycling performance. In response, YINCAE engineered low temperature solder joint encapsulation adhesives.
Technical Library | 2020-12-10 15:49:40.0
Electronic assemblies should have longer and longer service life. Today there are partially demanded 20 years of functional capability for electronics for automotive application. On the other hand, smaller components, such as resistors of size 0201, are able to endure an increasing number of thermal cycles until fail of solder joints, so these are tested sometimes up to 4000 cycles. But testing until the end of life is essential for the determination of failure rates and the prognosis of reliability. Such tests require a lot of time, but this is often not available in developing of new modules. A further acceleration by higher cycle temperatures is usually not possible, because the materials are already operated at the upper limit of the load. However, the duration can be shortened by the use of liquids for passive tests, which allow faster temperature changes and shorter dwell times because of better heat transfer compared to air. The question is whether such tests lead to comparable results and what failure mechanisms are becoming effective. The same goes for active temperature cycles, in which the components itself are heated from inside and the substrate remains comparatively cold. This paper describes the various accelerated temperature cycling tests, compares and evaluates the related degradation of solder joints.
Industry News | 2010-07-16 16:08:56.0
Practical Components, a leading international distributor of mechanical IC samples or “dummy” components and SMD production tools and equipment, announces in-stock availability of the popular 15 mm PoP Thermal Cycling Board.
http://www.ddmnovastar.com/reflow-ovens Reflow oven products, including batch reflow ovens, benchtop reflow ovens, and floor standing production models, for lead-free and lead based reflow soldering, curing, and thermal cycling applications.
Technical Library | 2019-12-26 19:13:52.0
Plated through hole (PTH) plays a critical role in printed circuit board (PCB) reliability. Thermal fatigue deformation of the PTH material is regarded as the primary factor affecting the lifetime of electrical devices. Numerous research efforts have focused on the failure mechanism model of PTH. However, most of the existing models were based on the one-dimensional structure hypothesis without taking the multilayered structure and external pad into consideration.In this paper, the constitutive relation of multilayered PTH is developed to establish the stress equation, and finite element analysis (FEA) is performed to locate the maximum stress and simulate the influence of the material properties. Finally, thermal cycle tests are conducted to verify the accuracy of the life prediction results. This model could be used in fatigue failure portable diagnosis and for life prediction of multilayered PCB.
Technical Library | 2020-10-14 14:33:36.0
Epoxy based adhesives are prevalent interface materials for all levels of electronic packaging. One reason for their widespread success is their ability to accept fillers. Fillers allow the adhesive formulator to tailor the electrical and thermal properties of a given epoxy. Silver flake allow the adhesive to be both electrically conductive and thermally conductive. For potting applications, heat sinking, and general encapsulation where high electrical isolation is required, aluminum oxide has been the filler of choice. Today, advanced Boron Nitride filled epoxies challenge alternative thermal interface materials like silicones, greases, tapes, or pads. The paper discusses key attributes for designing and formulating advanced thermally conductive epoxies. Comparisons to other common fillers used in packaging are made. The filler size, shape and distribution, as well as concentration in the resin, will determine the adhesive viscosity and rheology. Correlation's between Thermal Resistance calculations and adhesive viscosity are made. Examples are shown that determination of thermal conductivity values in "bulk" form, do not translate into actual package thermal resistance. Four commercially available thermally conductive adhesives were obtained for the study. Adhesives were screened by shear strength measurements, Thermal Cycling ( -55 °C to 125 °C ) Resistance, and damp heat ( 85 °C / 85 %RH ) resistance. The results indicate that low modulus Boron Nitride filled epoxies are superior in formulation and design. Careful selection of stress relief agents, filler morphology, and concentration levels are critical choices the skilled formulator must make. The advantages and limitations of each are discussed and demonstrated.
Industry Directory | Manufacturer
MPIQC is an Electronic Manufacturing Services (EMS) company. Our services are provided at the highest standards to be recognized as a global leader in OEM optimization in IPC Class 2 & Class 3 manufacturing.
Technical Library | 2021-09-08 14:10:12.0
The Pb-Free Alloy Characterization Program sponsored by International Electronics Manufacturing Initiative (iNEMI) is conducting an extensive investigation using accelerated temperature cycling (ATC) to evaluate ball grid array (BGA) thermal fatigue performance of 12 commercial or developmental Sn based Pb-free solder alloys. This paper presents the initial findings from a specific subset of the temperature cycling test matrix. The focus is on comparing alloy performance for two of the most commonly specified temperature cycles, 0 to 100 °C and -40 to 125 °C.
Industry News | 2015-12-01 11:54:37.0
Indium Corporation was presented with the Global Technology Award for Best Products - Americas for InFORMS® high-reliability solder preforms, on Nov. 10 at Productronica in Munich, Germany.
