Benchtop Coating/Dispensing System
The Sigma benchtop is a compact three-axis robotic gantry ideal for automating a variety of dispensing and coating applications. Featuring multiple mounting positions, users can easily incorporate multiple chemistries or application techniques into their process.
With remote programming capability and image background import, programs can be quickly uploaded from your desktop utilizing Sigma’s internal 2.4 GHz Wi-Fi network. Sigma combines PVA’s superior quality and global support in a flexible, multi-purpose robot that instantly brings repeatability to your manufacturing process.
The Sigma benchtop has many options and integrated features including:
- 5-inch touch interface with Wi-Fi connectivity
- Offline G-code numerical control programming
- Enclosed work area with safety interlock
- Single or dual valve mounting positions
- Standard jig plate mounting surface
Product Features
The application of a protective film or layer of liquid onto a PCB, either in selected areas or over the entire assembly. Conformal coatings are applied using an array of technologies such as atomized spray, airless film, needle dispense and jetting.
A two-step process of first dispensing a high viscosity fluid around the perimeter of a device or electronic circuitry, and then dispensing a low viscosity fluid within the perimeter to fully encase the components. The dam can be applied as a single or multi-layer bead depending on the target fill height required.
Applying an epoxy or silicone-based fluid that completely covers a defined area around a flip chip or wire bonded component. This provides mechanical shock and vibration stability, as well as environmental protection from moisture and foreign objects.
Also known as "form-in-place gasketing," this application dispenses one or two-part liquids into a groove or onto a flange that will cure to form a seal against liquids and gases. This automated process eliminates the task of assembling a die cut or pre-made gasket. Additionally, geometries can easily be modified for other designs.
The process of filling an enclosure that holds electronic circuitry, with a liquid that when cured completely encases the unit. This provides mechanical stability during shock and vibration as well as environmental protection from moisture and foreign objects.
Surface Mount Adhesive (SMA), solder paste, and filled epoxies require accurate deposits to adhere SMT components to a PCB surface. Consistent dot or bead profiles are critical for bonding a broad range of components with a growing emphasis on miniaturization that is achievable with jetting valves or auger pumps.
A thermal interface material ("TIM") fills gaps between mating surfaces with a substance that improves thermal conductivity beyond the air that would have otherwise filled that gap. The TIM acts as a conductive bridge that greatly improves heat transfer between a heat-generating device (e.g. an integrated circuit) and a heat-dissipating device (e.g. a heat sink).
The application of a fluid along one or more edges of an electronic component, such as a flip chip or BGA type package, that flows underneath using capillary action. Underfill is used to prevent thermal mismatch between the component and the substrate, prevent moisture penetration, and to provide mechanical stability during shock and vibration.