The manufacturing process are not visible in optical anomalies and deficiencies in the quality of solar panels to reduce the need to use to carry out acoustic microscope imaging and analysis, which can be modified before the start of mass production Inspiron E1405 battery processes to reduce defects, or to ensure that there is no introduction of defects in production.
In order to achieve maximum efficiency, solar panels manufacturer made a great effort. In the initial installation of equipment, efficiency must be high, installed after the solar system, even withstand thermal stress, and other harsh environments, but also to maintain high efficiency over the years.
The quality of solar panels may be due to arise from the manufacturing process to reduce the anomalies and defects. In the silicon solar panels, the typical defects are cracks, delamination, laptop battery or pores. Initially, the defect of the efficiency may be only a small impact in the manufacturers electrical testing or flash test, their impact seems negligible. However, in the process of using solar panels, these defects may grow up, until the efficiency will be greatly reduced.
Looking for these optical defects are not visible it is very important, because they are the shortcomings of the assembly process evidence. For example, Inspiron 1520 battery , Inspiron 1521 battery in silicon inside the crack, they are very small so can not be visually observed, but because silicon is a rigid, so when normal use of solar panels have been exposed to the sun, the thermal cycle will grow up these deficiencies.
In the past two years, the use of acoustic microscopy for imaging and analysis of solar cells and panels in the deficiencies in this area is developing fairly rapidly. Acoustic microscope in the non-destructive imaging that has a long history, its applications include encapsulation of integrated circuits, bonding wafers and other microelectronic devices, these samples in both materials and layered structures and solar cells and panels very close.
Acoustic imaging is aimed at the design stage, the sample stage or an early production to find anomalies and defects, resulting in changes before the start of mass production processes to reduce defects. Acoustic imaging in volume production, Latitude D830 battery , Latitude PPL battery will also be used to ensure that there is no introduction of defects in production. In this way, can get the design in the product’s high efficiency.
Acoustic microscope using an ultrasonic sensor to scan areas of interest, send ultrasonic pulses into the sample, and then receiving the return echoes from the sample inside. Materials in these products, the ultrasonic speed quickly, so scan thousands of sensors can be launched within a second pulse, while receiving thousands of echo. There is a place from each pulse is the acoustic data obtained in the acoustic image, like a few thousands in one.
Areas of interest, large or small. Scan usually only involves a single cells, but recent Sonocan has been reported, the existing automated acoustic microscope systems can easily be several meters long to complete the scan panel. As the number of echoes used to generate only come from within the 3149C battery , 3H625 battery plates or panels of material interfaces, such as glass blocks and the interface between silicon. The glass – silicon interface with a very thin optical bonding agent, so it is actually composed of two material interfaces.
Echo to reach the sensor from the battery plates or panels of different depths. In order to be interested only in the depth of imaging, so some echo would be abandoned. If the glass – silicon interface exactly the depth of interest, from the deeper areas (such as silicon and the substrate contact) return echo will be excluded and will not appear on the acoustic image. In the vocabulary of acoustic microscope, echo will be in the glass – silicon interface has been gated (gated). Deeper through the gated area and neglect from the glass – silicon depth of echo and deeper regions can separate image. In order to achieve test, TD347 battery , TD349 battery the strobe can be very precise, for example, imaging only the Ministry of glass and optical coupling agent interface, and does not contain optical coupling agent and silicon interface at the bottom of the image.
A battery-chip local area highly amplified acoustic. In order to obtain images, echo was gated in the glass and silicon interface, including between the glass and silicon adhesive.
Three levels of dark lines are wires. The white area is irregular stratification, which may be located between the adhesive and silicon at the bottom. They look very bright, which is should be a strong reflection of the ultrasonic return echo signal has a high magnification. Stratification seems to be expanding in the expansion process, they are limits of silicon on the metal wire. With a battery of other layered film has the same graphics, so layering is likely located between the optical and silicon adhesive.
These layered very small, in the current state of their efficiency and reliability with only a small impact. However, testing shows adhesive – silicon interface vulnerable to the impact of stratification. If more of the Inspiron 510m battery , Inspiron 5150 battery plates or panels also show a similar stratification, then the search for the causes of the significant stratification. In the large-size, so that the stratification will reduce the efficiency of solar cells, because they are not only reflected ultrasound, but also reflect sunlight, and therefore reduce the sunlight to reach the intensity of silicon. ?
Level is characterized by a conductive article, or more precisely, is the conductive interface between the article and silicon. Arrow points to the conductive portion of the rear right side of interface is very dark, indicating that echoes with a low magnification, from the bonding between the two kinds of materials, better place. But most conductive contact between the article and silicon area is very bright, which means absolutely no contact between them. At work, this is not connected may lead to overheating and failure of electrical conductivity. ?
A silicon cells with the bonding interface between silicon cells the acoustic basement, which is a condenser-type FK890 battery, lens focuses the input light into a highly efficient battery. Between the silicon and substrate in a layer of adhesive, so the image contains three kinds of acoustic materials and two interfaces, but also shows the bonding situation.
The characteristics of the red image is adhesive material in the pores. Holes is a very effective thermal insulation material. In the condenser system, the heat for a very hot battery and its important. And here’s pores hinder the battery cooling. Pores leading to the battery overheating and 4E368 battery may lead to uneven distribution of heat cracks.
Automatic image analysis showed that pores accounting for 5.48 percent bond area of the region. In the bottom right of the fan-shaped area, porosity is accounted for 11.69%. In this region is sufficient to keep the battery is classified as a defective Latitude D820 battery. Stomata may be inflated as the thermal cycle, but the battery will overheat and burn first.
In acoustics, the majority of silicon and metal pad between the weld can not see. In addition, silicon exists in a curve-shaped crack.
In Figure 4, the echo was closing in rectangular metal ball pads, and these metal balls between the pads and their connections are bonded to the battery. Two metal balls pad should have four welding points. The metal ball on the right pad has a full-size (yellow arrow) and a smaller welding points; while the left side of the metal ball pads only trace amounts of welding point, so such a design in space applications is a waste. In addition, the metal balls above the silicon pad has a crack (red arrow).
Displayed above the acoustic image shows some of Inspiron XPS Gen 2 battery , Inspiron XPS M170 battery the solar panels that may arise during the manufacturing process are common anomalies and deficiencies. These issues will enable early detection of these expensive failures in battery-less work place.