Technical Library | 2023-01-17 17:27:13.0
Reflow profile has significant impact on solder joint performance because it influences wetting and microstructure of the solder joint. The degree of wetting, the microstructure (in particular the intermetallic layer), and the inherent strength of the solder all factor into the reliability of the solder joint. This paper presents experimental results on the effect of reflow profile on both 63%Sn 37%Pb (SnPb) and 96.5%Sn 3.0%Ag 0.5%Cu (SAC 305) solder joint shear force. Specifically, the effect of the reflow peak temperature and time above solder liquidus temperature are studied. Nine reflow profiles for SAC 305 and nine reflow profiles for SnPb have been developed with three levels of peak temperature (230 o C, 240 o C, and 250 o C for SAC 305; and 195 o C, 205 o C, and 215 o C for SnPb) and three levels of time above solder liquidus temperature (30 sec., 60 sec., and 90 sec.). The shear force data of four different sizes of chip resistors (1206, 0805, 0603, and 0402) are compared across the different profiles. The shear force of the resistors is measured at time 0 (right after assembly). The fracture surfaces have been studied using a scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS)
New Equipment | Curing Equipment
Heller 788 In-line, Continuous Cure, Vertical Format Oven This elevator format oven utilizes vertical space to accomodate curing applications of up to 4 hours while only occupying 96" (2.5m) of floorspace. Perfect for underfill and encapsulant.
This elevator format oven utilizes vertical space to accomodate curing applications of up to 4 hours while only occupying 96" (2.5m) of floorspace. Perfect for underfill and encapsulant.
Technical Library | 2023-01-17 17:22:28.0
The impact of voiding on the solder joint integrity of ball grid arrays (BGAs)/chip scale packages (CSPs) can be a topic of lengthy and energetic discussion. Detailed industry investigations have shown that voids have little effect on solder joint integrity unless they fall into specific location/geometry configurations. These investigations have focused on thermal cycle testing at 0°C-100°C, which is typically used to evaluate commercial electronic products. This paper documents an investigation to determine the impact of voids in BGA and CSP components using thermal cycle testing (-55°C to +125°C) in accordance with the IPC- 9701 specification for tin/lead solder alloys. This temperature range is more typical of military and other high performance product use environments. A proposed BGA void requirement revision for the IPC-JSTD-001 specification will be extracted from the results analysis.
New Equipment | Curing Equipment
The mini vertical oven has a cycle time of 25 - 60 seconds per 150mm fixture, 4mm Edge Hold Pins and Guides. PCBs up to 250mm wide can be processed. Dual Feed option for high throughoutput. In-line, vertical automation of the epoxy cure process prod
1809 MK5 - Heller Advanced In-Line Vacuum Reflow Oven Nitrogen System with Balanced Flow Technology 9 Top And Bottom Heated Zones - highest zone count per linear foot in the industry! 100" Heated Length - for super throughput! 2 Internal C
1809 MK5 - Heller Advanced In-Line Vacuum Reflow Oven Nitrogen System with Balanced Flow Technology 9 Top And Bottom Heated Zones - highest zone count per linear foot in the industry! 100" Heated Length - for super throughput! 2 Internal C
Increase productivity, improve quality, reduce costs with vertical format curing solutions from Heller Industries. Learn more: http://www.hellerindustries.com/755-Vertical-Oven.php
Industry News | 2016-06-27 14:59:09.0
GPD Global introduces the NEW TempView Thermal Imaging System that ensures the success of heated dispensing processes like Underfill, Encapsulations, Dam and Fill, and more. The TempView Thermal Imaging System monitors the temperature of the entire substrate for complete heat profile characterization. Regions of the product may be selected for monitoring during the heating process. Now you can accurately monitor temperature of specific devices to be sure they are up to temperature before starting a process.
Jetting Simplified Jetting pumps are excellent for dispensing small volumes of fluid at high rates of speed. The NCM5000 simplifies jetting to its basic elements - this means easy set up, cleaning, and maintenance for you. The drive system is design
