Application of Focus Improvement to Reduce Non-Stick on Pad Problem in IC Packaging

Total Productive Maintenance (TPM) methodologies are used to eliminate profit loss or waste due to equipment failure or defect. TPM is designed to get maximum efficiency from the equipment while creating a satisfactory working environment. In Motorola, Selangor yield improvement had been an important agenda. One of the TPM pillar which is Focus Improvement activity is designed to minimize targeted losses that had been carefully measured and evaluated, was employed to improve yield in front-end assembly. The top three yield lost in parts per million (ppm) were contributed by the following defects in descending order: Non Stick on Pad (2715 ppm), chip and crack (782 ppm) and missing wire (687 ppni). The team focused on Non Stick on Pad (NSOP). which was the top yield lost contributor. NSOP was due to: floating die, bonded ball small in size, foreign matter on pad and classifications to say a few. Floating die contributed 48% of the NSOP defect. In this project detaile

Tensile Properties Of Woven Kenaf Fiber Reinforced Polypropylene Hybrid Aluminium-Composite

Concern on environmental impact of emission from the automobile and the uncertainties in fuel price has led to the development of lighter materials. Hybrid metal- composite is a sandwich structure which is lighter than its constituent monolithic metal. In this study, hybrid aluminium-composite (HAC) was fabricated using plain weave woven kenaf fiber reinforced polypropylene matrix composite sandwiched in between aluminium 6061-O using hot compression method. Tensile test was conducted on the HAC with two different fiber loading and fiber orientation. The fiber loading were with 1 mm pitch (X-type) and 5 mm pitch (Y-type) and the orientation were 0° and 45°. The result shows that tensile strength had been increased with the increment of fiber loading, where X-type tensile strength is higher than Y-type. Meanwhile, 45° fiber orientation gives higher tensile strength compared to 0°. The images of the fracture type experienced by the HAC after the tensile test was also observed

Application of total productive maintenance to reduce non-stick on pad problem in IC packaging.

Focus improvement activity was employed to improve front-end assembly yield in integrated circuit packaging. The top three yield losses in parts per million (ppm) in front-end assembly were contributed by the following defects: non-stick on pad (NSOP) (2715 ppm), chip and crack (782 ppm) and missing wire (687 ppm). NSOP was due to floating die, bonded ball small in size, foreign matter on pad and glassifications. Floating die contributed 48% of the NSOP defect. Detailed explanation on how focus improvement activity used to reduce NSOP due to floating die is demonstrated. Upon identifying the root cause of die floating, which was due to no support and weakness in the vacuum system, actions were taken to eliminate and to control the identified causes. As a result NSOP due to floating die was reduced from 1300 ppm to 650 ppm, a reduction of 50% within one year

Mechanical Properties Of Starch Composite Reinforced By Pineapple Leaf Fiber (Plf) From Josapine Cultivar

Nowadays, there is an increase in research about renewable natural fiber as an alternative solutions in replacing synthetic fibers such as glass fiber as reinforced composites materials that are non – biodegradable and non – ecofriendly to the system. Natural fibers are also known for its low cost production yet have excellent mechanical properties and is environmental friendly. One of the natural fiber resource is pineapple leaf fiber (PLF) which is planted widely in Malaysia. From current research, PLF contains high cellulose and exhibits good mechanical properties especially from Josapine family. In this study, the PLF from Josapine is used as reinforced materials and starch (SH) is used as the binder. Additionally, the effects of PLF loading and PLF fiber length on the mechanical properties of PLF/SH composites is also analyzed. Compositions ratio of PLF/SH composites is fixed at 50/50, 60/40 and 70/30. The lengths of the fiber are fixed to 2 cm, 4 cm and 6 cm. Before the fabrication, PLF has underwent alkaline treatment to increase the strength of fiber. All nine samples has underwent four different tests to determine the mechanical properties which are tensile test, hardness, density and microstructure analysis. PLF loading of 70% with 6 cm in length shows the higher values of tensile stress, density and hardness which are 14.53 MPa, 33.63 and 1.20 g/cm3 respectively

Optimization of Abrasive Water Jet Machining Process Parameters on Onyx Composite Followed by Additive Manufacturing

Fiber-reinforced additive manufacturing components have been used in various industrial applications in recent years, including in the production of aerospace, automobile, and biomedical components. Compared to conventional methods, additive manufacturing (AM) methods can be used to obtainin lighter parts with superior mechanical properties with lower setup costs and the ability to design more complex parts. Additionally, the fabrication of onyx composites using the conventional method can result in delamination, which is a significant issue during composite machining. To address these shortcomings, the fabrication of onyx composites via additive manufacturing with the Mark forged 3D-composite printer was considered. Machinability tests were conducted using abrasive water jet machining (AWJM) with various drilling diameters, traverse speeds, and abrasive mass flow rates. These parameters were optimized using Taguchi analysis and then validated using the Genetic algorithm (GA) and the Moth Flame Optimization algorithm (MFO). The surface morphology (Dmax) and the roughness of the drilled holes were determined using a vision measuring machine with 2D software (MITUTOYO v5.0) and a contact-type surface roughness tester. Confirmation testing demonstrated that the predicted values werenearly identical to the experimental standards. During the drilling of an onyx polymer composite, regression models, genetic algorithms and the Moth-Flame Optimization algorithm were used to estimate the response surface of delamination damage and surface roughness

Effect of starch sizes particle as binder on short pineapple leaf fiber composite mechanical properties

Pineapple leaf fiber (PLF) is one of the natural fibers that abundantly can be found in Malaysia, but the usage of the pineapple plant is limited only on their fruit and the other parts to be a waste. In this study, PLF is used as the reinforcement material and starch (SH) used as the matrix or binder. Both materials were combined with several compositions ratio (weight percentage) of PLF/SH composites which are 50PLF/50SH, 60PLF/40SH and 70PLF/30SH. Before undergo the fabrication process, the fiber has gone through an alkaline treatment to increase the strength of the fiber and chopped with an approximate size range from 0.5 mm to 5 mm. Besides that, SH powder is sieved to gain several particulate sizes which are 75 μm, 100 μm and 250 μm. The related tests such as flexural, hardness, density tests and macrostructure analysis have been done to determine their mechanical properties of composite. Based on the results, the sample with composition of 70PL/30SH with 75 μm has shown the highest result for flexural stress which is 14.49 MPa. While, the composite with the same composition of 70PLF/30SH with particulate size SH of 250 μm has shown the highest result in the hardness of 67 Shore-D and density of 1.36 g/cm3 respectively

Effect of starch sizes particle as binder on short pineapple leaf fiber composite mechanical properties

Pineapple leaf fiber (PLF) is one of the natural fibers that abundantly can be found in Malaysia, but the usage of the pineapple plant is limited only on their fruit and the other parts to be a waste. In this study, PLF is used as the reinforcement material and starch (SH) used as the matrix or binder. Both materials were combined with several compositions ratio (weight percentage) of PLF/SH composites which are 50PLF/50SH, 60PLF/40SH and 70PLF/30SH. Before undergo the fabrication process, the fiber has gone through an alkaline treatment to increase the strength of the fiber and chopped with an approximate size range from 0.5 mm to 5 mm. Besides that, SH powder is sieved to gain several particulate sizes which are 75 μm, 100 μm and 250 μm. The related tests such as flexural, hardness, density tests and macrostructure analysis have been done to determine their mechanical properties of composite. Based on the results, the sample with composition of 70PL/30SH with 75 μm has shown the highest result for flexural stress which is 14.49 MPa. While, the composite with the same composition of 70PLF/30SH with particulate size SH of 250 μm has shown the highest result in the hardness of 67 Shore-D and density of 1.36 g/cm3 respectively