The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The dielectric response of two bisphenol-A epoxy resin systems Araldite CY1301 (Tg ~ 50°C) and Araldite CY1311 (Tg ~0°C) was studied at different levels of absorbed moisture. The dielectric measurements were carried out over the frequency range 1 mHz to 100 kHz and the results were characterised in terms of dc bulk electrical conduction and dielectric processes. The characteristic parameters (frequency...
A traditional constant voltage conductivity test method was used to measure how the conductivity of highly insulating low-density polyethylene (LDPE) polymer films depends on applied electric field, repeated and prolonged electric field exposure, and sample temperature. The strength of the applied voltage was varied to determine the electric field dependence. At low electric field, the resistivity...
Electrical conduction properties of Ave biodegradable polymers, polycaprolactone, polybutylene succinate adipate, polybutylene succinate, polybutylene adipate terephthalate, and poly-L-lactic acid, are discussed in relation to their measured values of glass transition temperature, complex permittivity, and breakdown strength. Conductivity is high in the polymers with low glass transition temperatures,...
This paper investigates variations in the electrical properties of a typical isotropic conductive adhesive (ICA) with an epoxy-based binder that are caused by differences in the curing conditions. In-situ monitoring of the various processes that were used to cure the ICA revealed that electrical conduction in ICA specimens depends on both the high-temperature curing conditions and the cooling conditions...
Effect of crystallinity change on electrical conduction characteristics of poly-L-lactic acid was studied experimentally. The crystallinity was changed by thermal annealing. The lower crystallinity samples have more remaining charge than the higher crystallinity samples. Moreover, at 80 degC that is above their glass transition temperatures (Tg: 55-60 degC), the conductivity is much higher in the...
The composite of low-density polyethylene (LDPE)/nano SiO/sub x/ was prepared by the method of double-solution mixture, and its high field volt-ampere characteristic (HFVAC) was studied The HFVAC of the composite significantly differs to that of pure LDPE. More interesting is that, at the contents of 0.5%-3% of nano SiOx, the percolation phenomena exits in the HFVAC of the composite. At the same time,...
Nonconductive adhesive (NCA) flip chip interconnect is emerging as an attractive alternative to lead or lead-free solder interconnects due to its environmental friendliness, lower processing temperatures and extendability to fine pitch applications. The conductivity of a NCA interconnect is completely dependent on the direct mechanical contact between the IC bump and the substrate pad. The contact...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.